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options.txt   Nvim


                  VIM REFERENCE MANUAL    by Bram Moolenaar


Options                                                 options

For an overview of options see quickref.txt option-list.

Vim has a number of internal variables and switches which can be set to
achieve special effects.  These options come in three forms:
        boolean         can only be on or off           boolean toggle
        number          has a numeric value
        string          has a string value

                                      Type gO to see the table of contents.

==============================================================================
1. Setting options                                      set-option E764

                                                        :se :set
:se[t][!]               Show all options that differ from their default value.
                        When [!] is present every option is on a separate
                        line.

:se[t][!] all           Show all options.
                        When [!] is present every option is on a separate
                        line.

                                                                E518 E519
:se[t] {option}?        Show value of {option}.

:se[t] {option}         Toggle option: set, switch it on.
                        Number option: show value.
                        String option: show value.

:se[t] no{option}       Toggle option: Reset, switch it off.

                                                           :set-! :set-inv
:se[t] {option}!   or
:se[t] inv{option}      Toggle option: Invert value.

                                :set-default :set-& :set-&vi :set-&vim
:se[t] {option}&        Reset option to its default value.
:se[t] {option}&vi      Reset option to its Vi default value.
:se[t] {option}&vim     Reset option to its Vim default value.

:se[t] all&             Set all options to their default value.  The values of
                        these options are not changed:
                          'columns'
                          'lines'
                        Warning: This may have a lot of side effects.

                                                :set-args E487 E521
:se[t] {option}={value}         or
:se[t] {option}:{value}
                        Set string or number option to {value}.
                        For numeric options the value can be given in decimal,
                        hex (preceded with 0x) or octal (preceded with '0').
                        The old value can be inserted by typing 'wildchar' (by
                        default this is a <Tab>).  See cmdline-completion.
                        White space between {option} and '=' is allowed and
                        will be ignored.  White space between '=' and {value}
                        is not allowed.
                        See option-backslash for using white space and
                        backslashes in {value}.

:se[t] {option}+={value}                                :set+=
                        Add the {value} to a number option, or append the
                        {value} to a string option.  When the option is a
                        comma-separated list, a comma is added, unless the
                        value was empty.
                        If the option is a list of flags, superfluous flags
                        are removed.  When adding a flag that was already
                        present the option value doesn't change.
                        Also see :set-args above.

:se[t] {option}^={value}                                :set^=
                        Multiply the {value} to a number option, or prepend
                        the {value} to a string option.  When the option is a
                        comma-separated list, a comma is added, unless the
                        value was empty.
                        Also see :set-args above.

:se[t] {option}-={value}                                :set-=
                        Subtract the {value} from a number option, or remove
                        the {value} from a string option, if it is there.
                        If the {value} is not found in a string option, there
                        is no error or warning.  When the option is a comma-
                        separated list, a comma is deleted, unless the option
                        becomes empty.
                        When the option is a list of flags, {value} must be
                        exactly as they appear in the option.  Remove flags
                        one by one to avoid problems.
                        Also see :set-args above.

The {option} arguments to ":set" may be repeated.  For example: 
        :set ai nosi sw=3 ts=3
If you make an error in one of the arguments, an error message will be given
and the following arguments will be ignored.

                                                        :set-verbose
When 'verbose' is non-zero, displaying an option value will also tell where it
was last set.  Example: 
        :verbose set shiftwidth cindent?
  shiftwidth=4 
          Last set from modeline line 1 
  cindent 
          Last set from /usr/local/share/vim/vim60/ftplugin/c.vim line 30 
This is only done when specific option values are requested, not for ":verbose
set all" or ":verbose set" without an argument.
When the option was set by hand there is no "Last set" message.
When the option was set while executing a function, user command or
autocommand, the script in which it was defined is reported.
A few special texts:
        Last set from modeline line 1 
                Option was set in a modeline.
        Last set from --cmd argument 
                Option was set with command line argument --cmd or +.
        Last set from -c argument 
                Option was set with command line argument -c, +, -S or
                -q.
        Last set from environment variable 
                Option was set from $VIMINIT.
        Last set from error handler 
                Option was cleared when evaluating it resulted in an error.

                                                        option-backslash
To include white space in a string option value it has to be preceded with a
backslash.  To include a backslash you have to use two.  Effectively this
means that the number of backslashes in an option value is halved (rounded
down).
A few examples: 
   :set tags=tags\ /usr/tags        results in "tags /usr/tags"
   :set tags=tags\\,file            results in "tags\,file"
   :set tags=tags\\\ file           results in "tags\ file"

The "|" character separates a ":set" command from a following command.  To
include the "|" in the option value, use "\|" instead.  This example sets the
'titlestring' option to "hi|there": 
   :set titlestring=hi\|there
This sets the 'titlestring' option to "hi" and 'iconstring' to "there": 
   :set titlestring=hi|set iconstring=there

Similarly, the double quote character starts a comment.  To include the '"' in
the option value, use '\"' instead.  This example sets the 'titlestring'
option to 'hi "there"': 
   :set titlestring=hi\ \"there\"

For Win32 backslashes in file names are mostly not removed.  More precise: For
options that expect a file name (those where environment variables are
expanded) a backslash before a normal file name character is not removed.  But
a backslash before a special character (space, backslash, comma, etc.) is used
like explained above.
There is one special situation, when the value starts with "\\": 
   :set dir=\\machine\path          results in "\\machine\path"
   :set dir=\\\\machine\\path       results in "\\machine\path"
   :set dir=\\path\\file            results in "\\path\file" (wrong!)
For the first one the start is kept, but for the second one the backslashes
are halved.  This makes sure it works both when you expect backslashes to be
halved and when you expect the backslashes to be kept.  The third gives a
result which is probably not what you want.  Avoid it.

                                add-option-flags remove-option-flags
                                E539 E550 E551 E552
Some options are a list of flags.  When you want to add a flag to such an
option, without changing the existing ones, you can do it like this: 
   :set guioptions+=a
Remove a flag from an option like this: 
   :set guioptions-=a
This removes the 'a' flag from 'guioptions'.
Note that you should add or remove one flag at a time.  If 'guioptions' has
the value "ab", using "set guioptions-=ba" won't work, because the string "ba"
doesn't appear.

                           :set_env expand-env expand-environment-var
Environment variables in specific string options will be expanded.  If the
environment variable exists the '$' and the following environment variable
name is replaced with its value.  If it does not exist the '$' and the name
are not modified.  Any non-id character (not a letter, digit or '_') may
follow the environment variable name.  That character and what follows is
appended to the value of the environment variable.  Examples: 
   :set term=$TERM.new
   :set path=/usr/$INCLUDE,$HOME/include,.
When adding or removing a string from an option with ":set opt-=val" or ":set
opt+=val" the expansion is done before the adding or removing.


Handling of local options                       local-options

Some of the options only apply to a window or buffer.  Each window or buffer
has its own copy of this option, thus each can have its own value.  This
allows you to set 'list' in one window but not in another.  And set
'shiftwidth' to 3 in one buffer and 4 in another.

The following explains what happens to these local options in specific
situations.  You don't really need to know all of this, since Vim mostly uses
the option values you would expect.  Unfortunately, doing what the user
expects is a bit complicated...

When splitting a window, the local options are copied to the new window.  Thus
right after the split the contents of the two windows look the same.

When editing a new buffer, its local option values must be initialized.  Since
the local options of the current buffer might be specifically for that buffer,
these are not used.  Instead, for each buffer-local option there also is a
global value, which is used for new buffers.  With ":set" both the local and
global value is changed.  With "setlocal" only the local value is changed,
thus this value is not used when editing a new buffer.

When editing a buffer that has been edited before, the options from the window
that was last closed are used again.  If this buffer has been edited in this
window, the values from back then are used.  Otherwise the values from the
last closed window where the buffer was edited last are used.

It's possible to set a local window option specifically for a type of buffer.
When you edit another buffer in the same window, you don't want to keep
using these local window options.  Therefore Vim keeps a global value of the
local window options, which is used when editing another buffer.  Each window
has its own copy of these values.  Thus these are local to the window, but
global to all buffers in the window.  With this you can do: 
        :e one
        :set list
        :e two
Now the 'list' option will also be set in "two", since with the ":set list"
command you have also set the global value. 
        :set nolist
        :e one
        :setlocal list
        :e two
Now the 'list' option is not set, because ":set nolist" resets the global
value, ":setlocal list" only changes the local value and ":e two" gets the
global value.  Note that if you do this next: 
        :e one
You will get back the 'list' value as it was the last time you edited "one".
The options local to a window are remembered for each buffer.  This also
happens when the buffer is not loaded, but they are lost when the buffer is
wiped out :bwipe.

                                                        :setl :setlocal
:setl[ocal][!] ...      Like ":set" but set only the value local to the
                        current buffer or window.  Not all options have a
                        local value.  If the option does not have a local
                        value the global value is set.
                        With the "all" argument: display local values for all
                        local options.
                        Without argument: Display local values for all local
                        options which are different from the default.
                        When displaying a specific local option, show the
                        local value.  For a global/local boolean option, when
                        the global value is being used, "--" is displayed
                        before the option name.
                        For a global option the global value is
                        shown (but that might change in the future).

:setl[ocal] {option}<   Set the local value of {option} to its global value by
                        copying the value.

:se[t] {option}<        For global-local options: Remove the local value of
                        {option}, so that the global value will be used.

                                                        :setg :setglobal
:setg[lobal][!] ...     Like ":set" but set only the global value for a local
                        option without changing the local value.
                        When displaying an option, the global value is shown.
                        With the "all" argument: display global values for all
                        local options.
                        Without argument: display global values for all local
                        options which are different from the default.

For buffer-local and window-local options:
        Command          global value       local value 
      :set option=value      set                set
 :setlocal option=value       -                 set
:setglobal option=value      set                 -
      :set option?            -                display
 :setlocal option?            -                display
:setglobal option?          display              -


Global options with a local value                       global-local

Options are global when you mostly use one value for all buffers and windows.
For some global options it's useful to sometimes have a different local value.
You can set the local value with ":setlocal".  That buffer or window will then
use the local value, while other buffers and windows continue using the global
value.

For example, you have two windows, both on C source code.  They use the global
'makeprg' option.  If you do this in one of the two windows: 
        :set makeprg=gmake
then the other window will switch to the same value.  There is no need to set
the 'makeprg' option in the other C source window too.
However, if you start editing a Perl file in a new window, you want to use
another 'makeprg' for it, without changing the value used for the C source
files.  You use this command: 
        :setlocal makeprg=perlmake
You can switch back to using the global value by making the local value empty: 
        :setlocal makeprg=
This only works for a string option.  For a number or boolean option you need
to use the "<" flag, like this: 
        :setlocal autoread<
Note that for non-boolean and non-number options using "<" copies the global
value to the local value, it doesn't switch back to using the global value
(that matters when the global value changes later).  You can also use: 
        :set path<
This will make the local value of 'path' empty, so that the global value is
used.  Thus it does the same as: 
        :setlocal path=
Note: In the future more global options can be made global-local.  Using
":setlocal" on a global option might work differently then.


                                                option-value-function
Some options ('completefunc', 'imactivatefunc', 'imstatusfunc', 'omnifunc',
'operatorfunc', 'quickfixtextfunc' and 'tagfunc') are set to a function name
or a function reference or a lambda function.  Examples:

        set opfunc=MyOpFunc
        set opfunc=function("MyOpFunc")
        set opfunc=funcref("MyOpFunc")
        set opfunc={t\ ->\ MyOpFunc(t)}


Setting the filetype

:setf[iletype] [FALLBACK] {filetype}                    :setf :setfiletype
                        Set the 'filetype' option to {filetype}, but only if
                        not done yet in a sequence of (nested) autocommands.
                        This is short for: 
                                :if !did_filetype()
                                :  setlocal filetype={filetype}
                                :endif
                       This command is used in a filetype.vim file to avoid
                        setting the 'filetype' option twice, causing different
                        settings and syntax files to be loaded.

                        When the optional FALLBACK argument is present, a
                        later :setfiletype command will override the
                        'filetype'.  This is to be used for filetype
                        detections that are just a guess.  did_filetype()
                        will return false after this command.

                                option-window optwin
:bro[wse] se[t]                 :set-browse :browse-set :opt :options
:opt[ions]              Open a window for viewing and setting all options.
                        Options are grouped by function.
                        Offers short help for each option.  Hit <CR> on the
                        short help to open a help window with more help for
                        the option.
                        Modify the value of the option and hit <CR> on the
                        "set" line to set the new value.  For window and
                        buffer specific options, the last accessed window is
                        used to set the option value in, unless this is a help
                        window, in which case the window below help window is
                        used (skipping the option-window).

                                                                $HOME
Using "~" is like using "$HOME", but it is only recognized at the start of an
option and after a space or comma.

On Unix systems "~user" can be used too.  It is replaced by the home directory
of user "user".  Example: 
    :set path=~mool/include,/usr/include,.

On Unix systems the form "${HOME}" can be used too.  The name between {} can
contain non-id characters then.  Note that if you want to use this for the
"gf" command, you need to add the '{' and '}' characters to 'isfname'.

NOTE: expanding environment variables and "~/" is only done with the ":set"
command, not when assigning a value to an option with ":let".

                                                        $HOME-windows
On MS-Windows, if $HOME is not defined as an environment variable, then
at runtime Vim will set it to the expansion of $HOMEDRIVE$HOMEPATH.
If $HOMEDRIVE is not set then $USERPROFILE is used.

This expanded value is not exported to the environment, this matters when
running an external command: 
        :echo system('set | findstr ^HOME=')
and 
        :echo luaeval('os.getenv("HOME")')
should echo nothing (an empty string) despite exists('$HOME') being true.
When setting $HOME to a non-empty string it will be exported to the
subprocesses.


Note the maximum length of an expanded option is limited.  How much depends on
the system, mostly it is something like 256 or 1024 characters.

==============================================================================
2. Automatically setting options                        auto-setting

Besides changing options with the ":set" command, there are three alternatives
to set options automatically for one or more files:

1. When starting Vim initializations are read from various places.  See
   initialization.  Most of them are performed for all editing sessions,
   and some of them depend on the directory where Vim is started.
   You can create an initialization file with :mkvimrc, :mkview and
   :mksession.
2. If you start editing a new file, the automatic commands are executed.
   This can be used to set options for files matching a particular pattern and
   many other things.  See autocommand.
3. If you start editing a new file, and the 'modeline' option is on, a
   number of lines at the beginning and end of the file are checked for
   modelines.  This is explained here.

                                        modeline vim: vi: ex: E520
There are two forms of modelines.  The first form:
        [text{white}]{vi:vim:ex:}[white]{options}

[text{white}]           empty or any text followed by at least one blank
                        character (<Space> or <Tab>); "ex:" always requires at
                        least one blank character
{vi:|vim:|ex:}          the string "vi:", "vim:" or "ex:"
[white]                 optional white space
{options}               a list of option settings, separated with white space
                        or ':', where each part between ':' is the argument
                        for a ":set" command (can be empty)

Examples:
   vi:noai:sw=3 ts=6 
   vim: tw=77 

The second form (this is compatible with some versions of Vi):

        [text{white}]{vi:vim:Vim:|ex:}[white]se[t] {options}:[text]

[text{white}]           empty or any text followed by at least one blank
                        character (<Space> or <Tab>); "ex:" always requires at
                        least one blank character
{vi:|vim:|Vim:|ex:}     the string "vi:", "vim:", "Vim:" or "ex:"
[white]                 optional white space
se[t]                   the string "set " or "se " (note the space); When
                        "Vim" is used it must be "set".
{options}               a list of options, separated with white space, which
                        is the argument for a ":set" command
:                       a colon
[text]                  any text or empty

Examples:
   /* vim: set ai tw=75: */ 
   /* Vim: set ai tw=75: */ 

The white space before {vi:|vim:|Vim:|ex:} is required.  This minimizes the
chance that a normal word like "lex:" is caught.  There is one exception:
"vi:" and "vim:" can also be at the start of the line (for compatibility with
version 3.0).  Using "ex:" at the start of the line will be ignored (this
could be short for "example:").

If the modeline is disabled within a modeline, subsequent modelines will be
ignored.  This is to allow turning off modeline on a per-file basis.  This is
useful when a line looks like a modeline but isn't.  For example, it would be
good to start a YAML file containing strings like "vim:" with
    # vim: nomodeline 
so as to avoid modeline misdetection.  Following options on the same line
after modeline deactivation, if any, are still evaluated (but you would
normally not have any).

                                                        modeline-local
The options are set like with ":setlocal": The new value only applies to the
buffer and window that contain the file.  Although it's possible to set global
options from a modeline, this is unusual.  If you have two windows open and
the files in it set the same global option to a different value, the result
depends on which one was opened last.

When editing a file that was already loaded, only the window-local options
from the modeline are used.  Thus if you manually changed a buffer-local
option after opening the file, it won't be changed if you edit the same buffer
in another window.  But window-local options will be set.

                                                        modeline-version
If the modeline is only to be used for some versions of Vim, the version
number can be specified where "vim:" or "Vim:" is used:
        vim{vers}:      version {vers} or later
        vim<{vers}:     version before {vers}
        vim={vers}:     version {vers}
        vim>{vers}:     version after {vers}
{vers} is 700 for Vim 7.0 (hundred times the major version plus minor).
For example, to use a modeline only for Vim 7.0:
        /* vim700: set foldmethod=marker */ 
To use a modeline for Vim after version 7.2:
        /* vim>702: set cole=2: */ 
There can be no blanks between "vim" and the ":".
The modeline is ignored if {vers} does not fit in an integer.


The number of lines that are checked can be set with the 'modelines' option.
If 'modeline' is off or 'modelines' is 0 no lines are checked.

Note that for the first form all of the rest of the line is used, thus a line
like:
   /* vi:ts=4: */ 
will give an error message for the trailing "*/".  This line is OK:
   /* vi:set ts=4: */ 

If an error is detected the rest of the line is skipped.

If you want to include a ':' in a set command precede it with a '\'.  The
backslash in front of the ':' will be removed.  Example:
   /* vi:set fillchars=stl\:^,vert\:\|: */ 
This sets the 'fillchars' option to "stl:^,vert:\|".  Only a single backslash
before the ':' is removed.  Thus to include "\:" you have to specify "\\:".
                                                        E992
No other commands than "set" are supported, for security reasons (somebody
might create a Trojan horse text file with modelines).  And not all options
can be set.  For some options a flag is set, so that when the value is used
the sandbox is effective.  Some options can only be set from the modeline
when 'modelineexpr' is set (the default is off).

Still, there is always a small risk that a modeline causes trouble.  E.g.,
when some joker sets 'textwidth' to 5 all your lines are wrapped unexpectedly.
So disable modelines before editing untrusted text.  The mail ftplugin does
this, for example.

Hint: If you would like to do something else than setting an option, you could
define an autocommand that checks the file for a specific string.  For
example: 
        au BufReadPost * if getline(1) =~ "VAR" | call SetVar() | endif
And define a function SetVar() that does something with the line containing
"VAR".

==============================================================================
3. Options summary                                      option-summary

In the list below all the options are mentioned with their full name and with
an abbreviation if there is one.  Both forms may be used.

In this document when a boolean option is "set" that means that ":set option"
is entered.  When an option is "reset", ":set nooption" is used.

Most options are the same in all windows and buffers.  There are a few that
are specific to how the text is presented in a window.  These can be set to a
different value in each window.  For example the 'list' option can be set in
one window and reset in another for the same text, giving both types of view
at the same time.  There are a few options that are specific to a certain
file.  These can have a different value for each file or buffer.  For example
the 'textwidth' option can be 78 for a normal text file and 0 for a C
program.

        global                  one option for all buffers and windows
        local to window         each window has its own copy of this option
        local to buffer         each buffer has its own copy of this option

When creating a new window the option values from the currently active window
are used as a default value for the window-specific options.  For the
buffer-specific options this depends on the 's' and 'S' flags in the
'cpoptions' option.  If 's' is included (which is the default) the values for
buffer options are copied from the currently active buffer when a buffer is
first entered.  If 'S' is present the options are copied each time the buffer
is entered, this is almost like having global options.  If 's' and 'S' are not
present, the options are copied from the currently active buffer when the
buffer is created.

Hidden options                                          hidden-options

Not all options are supported in all versions.  This depends on the supported
features and sometimes on the system.  A remark about this is in curly braces
below.  When an option is not supported it may still be set without getting an
error, this is called a hidden option.  You can't get the value of a hidden
option though, it is not stored.

To test if option "foo" can be used with ":set" use something like this: 
        if exists('&foo')
This also returns true for a hidden option.  To test if option "foo" is really
supported use something like this: 
        if exists('+foo')

                                                        E355
A jump table for the options with a short description can be found at Q_op.

                                        'aleph' 'al' aleph Aleph
'aleph' 'al'            number  (default 224)
                        global
        The ASCII code for the first letter of the Hebrew alphabet.  The
        routine that maps the keyboard in Hebrew mode, both in Insert mode
        (when hkmap is set) and on the command-line (when hitting CTRL-_)
        outputs the Hebrew characters in the range [aleph..aleph+26].
        aleph=128 applies to PC code, and aleph=224 applies to ISO 8859-8.
        See rileft.txt.

                        'allowrevins' 'ari' 'noallowrevins' 'noari'
'allowrevins' 'ari'     boolean (default off)
                        global
        Allow CTRL-_ in Insert and Command-line mode.  This is default off, to
        avoid that users that accidentally type CTRL-_ instead of SHIFT-_ get
        into reverse Insert mode, and don't know how to get out.  See
        'revins'.

                                                'ambiwidth' 'ambw'
'ambiwidth' 'ambw'      string (default: "single")
                        global
        Tells Vim what to do with characters with East Asian Width Class
        Ambiguous (such as Euro, Registered Sign, Copyright Sign, Greek
        letters, Cyrillic letters).

        There are currently two possible values:
        "single":       Use the same width as characters in US-ASCII.  This is
                        expected by most users.
        "double":       Use twice the width of ASCII characters.
                                                        E834 E835
        The value "double" cannot be used if 'listchars' or 'fillchars'
        contains a character that would be double width.  These errors may
        also be given when calling setcellwidths().

        The values are overruled for characters specified with
        setcellwidths().

        There are a number of CJK fonts for which the width of glyphs for
        those characters are solely based on how many octets they take in
        legacy/traditional CJK encodings.  In those encodings, Euro,
        Registered sign, Greek/Cyrillic letters are represented by two octets,
        therefore those fonts have "wide" glyphs for them.  This is also
        true of some line drawing characters used to make tables in text
        file.  Therefore, when a CJK font is used for GUI Vim or
        Vim is running inside a terminal (emulators) that uses a CJK font
        (or Vim is run inside an xterm invoked with "-cjkwidth" option.),
        this option should be set to "double" to match the width perceived
        by Vim with the width of glyphs in the font.  Perhaps it also has
        to be set to "double" under CJK MS-Windows when the system locale is
        set to one of CJK locales.  See Unicode Standard Annex #11
        (https://www.unicode.org/reports/tr11).

                        'autochdir' 'acd' 'noautochdir' 'noacd'
'autochdir' 'acd'       boolean (default off)
                        global
        When on, Vim will change the current working directory whenever you
        open a file, switch buffers, delete a buffer or open/close a window.
        It will change to the directory containing the file which was opened
        or selected.  When a buffer has no name it also has no directory, thus
        the current directory won't change when navigating to it.
        Note: When this option is on some plugins may not work.

                                'arabic' 'arab' 'noarabic' 'noarab'
'arabic' 'arab'         boolean (default off)
                        local to window
        This option can be set to start editing Arabic text.
        Setting this option will:
        - Set the 'rightleft' option, unless 'termbidi' is set.
        - Set the 'arabicshape' option, unless 'termbidi' is set.
        - Set the 'keymap' option to "arabic"; in Insert mode CTRL-^ toggles
          between typing English and Arabic key mapping.
        - Set the 'delcombine' option

        Resetting this option will:
        - Reset the 'rightleft' option.
        - Disable the use of 'keymap' (without changing its value).
        Note that 'arabicshape' and 'delcombine' are not reset (it is a global
        option).
        Also see arabic.txt.

                                        'arabicshape' 'arshape'
                                        'noarabicshape' 'noarshape'
'arabicshape' 'arshape' boolean (default on)
                        global
        When on and 'termbidi' is off, the required visual character
        corrections that need to take place for displaying the Arabic language
        take effect.  Shaping, in essence, gets enabled; the term is a broad
        one which encompasses:
          a) the changing/morphing of characters based on their location
             within a word (initial, medial, final and stand-alone).
          b) the enabling of the ability to compose characters
          c) the enabling of the required combining of some characters
        When disabled the display shows each character's true stand-alone
        form.
        Arabic is a complex language which requires other settings, for
        further details see arabic.txt.

                        'autoindent' 'ai' 'noautoindent' 'noai'
'autoindent' 'ai'       boolean (default on)
                        local to buffer
        Copy indent from current line when starting a new line (typing <CR>
        in Insert mode or when using the "o" or "O" command).  If you do not
        type anything on the new line except <BS> or CTRL-D and then type
        <Esc>, CTRL-O or <CR>, the indent is deleted again.  Moving the cursor
        to another line has the same effect, unless the 'I' flag is included
        in 'cpoptions'.
        When autoindent is on, formatting (with the "gq" command or when you
        reach 'textwidth' in Insert mode) uses the indentation of the first
        line.
        When 'smartindent' or 'cindent' is on the indent is changed in
        a different way.
        The 'autoindent' option is reset when the 'paste' option is set and
        restored when 'paste' is reset.
        {small difference from Vi: After the indent is deleted when typing
        <Esc> or <CR>, the cursor position when moving up or down is after the
        deleted indent; Vi puts the cursor somewhere in the deleted indent}.

                                 'autoread' 'ar' 'noautoread' 'noar'
'autoread' 'ar'         boolean (default on)
                        global or local to buffer global-local
        When a file has been detected to have been changed outside of Vim and
        it has not been changed inside of Vim, automatically read it again.
        When the file has been deleted this is not done, so you have the text
        from before it was deleted.  When it appears again then it is read.
        timestamp
        If this option has a local value, use this command to switch back to
        using the global value: 
                :set autoread<

                                 'autowrite' 'aw' 'noautowrite' 'noaw'
'autowrite' 'aw'        boolean (default off)
                        global
        Write the contents of the file, if it has been modified, on each
        :next, :rewind, :last, :first, :previous, :stop,
        :suspend, :tag, :!, :make, CTRL-] and CTRL-^ command; and when
        a :buffer, CTRL-O, CTRL-I, '{A-Z0-9}, or `{A-Z0-9} command takes one
        to another file.
        A buffer is not written if it becomes hidden, e.g. when 'bufhidden' is
        set to "hide" and :next is used.
        Note that for some commands the 'autowrite' option is not used, see
        'autowriteall' for that.
        Some buffers will not be written, specifically when 'buftype' is
        "nowrite", "nofile", "terminal" or "prompt".

                         'autowriteall' 'awa' 'noautowriteall' 'noawa'
'autowriteall' 'awa'    boolean (default off)
                        global
        Like 'autowrite', but also used for commands ":edit", ":enew", ":quit",
        ":qall", ":exit", ":xit", ":recover" and closing the Vim window.
        Setting this option also implies that Vim behaves like 'autowrite' has
        been set.

                                                        'background' 'bg'
'background' 'bg'       string  (default "dark")
                        global
        When set to "dark" or "light", adjusts the default color groups for
        that background type.  The TUI or other UI sets this on startup
        (triggering OptionSet) if it can detect the background color.

        This option does NOT change the background color, it tells Nvim what
        the "inherited" (terminal/GUI) background looks like.
        See :hi-normal if you want to set the background color explicitly.
                                                g:colors_name
        When a color scheme is loaded (the "g:colors_name" variable is set)
        setting 'background' will cause the color scheme to be reloaded.  If
        the color scheme adjusts to the value of 'background' this will work.
        However, if the color scheme sets 'background' itself the effect may
        be undone.  First delete the "g:colors_name" variable when needed.

        Normally this option would be set in the vimrc file.  Possibly
        depending on the terminal name.  Example: 
                :if $TERM ==# "xterm"
                :  set background=dark
                :endif
       When this option is set, the default settings for the highlight groups
        will change.  To use other settings, place ":highlight" commands AFTER
        the setting of the 'background' option.
        This option is also used in the "$VIMRUNTIME/syntax/syntax.vim" file
        to select the colors for syntax highlighting.  After changing this
        option, you must load syntax.vim again to see the result.  This can be
        done with ":syntax on".

                                                        'backspace' 'bs'
'backspace' 'bs'        string  (default "indent,eol,start")
                        global
        Influences the working of <BS>, <Del>, CTRL-W and CTRL-U in Insert
        mode.  This is a list of items, separated by commas.  Each item allows
        a way to backspace over something:
        value   effect  
        indent  allow backspacing over autoindent
        eol     allow backspacing over line breaks (join lines)
        start   allow backspacing over the start of insert; CTRL-W and CTRL-U
                stop once at the start of insert.
        nostop  like start, except CTRL-W and CTRL-U do not stop at the start of
                insert.

        When the value is empty, Vi compatible backspacing is used, none of
        the ways mentioned for the items above are possible.

        For backwards compatibility with version 5.4 and earlier:
        value   effect  
          0     same as ":set backspace=" (Vi compatible)
          1     same as ":set backspace=indent,eol"
          2     same as ":set backspace=indent,eol,start"
          3     same as ":set backspace=indent,eol,nostop"

                                'backup' 'bk' 'nobackup' 'nobk'
'backup' 'bk'           boolean (default off)
                        global
        Make a backup before overwriting a file.  Leave it around after the
        file has been successfully written.  If you do not want to keep the
        backup file, but you do want a backup while the file is being
        written, reset this option and set the 'writebackup' option (this is
        the default).  If you do not want a backup file at all reset both
        options (use this if your file system is almost full).  See the
        backup-table for more explanations.
        When the 'backupskip' pattern matches, a backup is not made anyway.
        When 'patchmode' is set, the backup may be renamed to become the
        oldest version of a file.

                                                'backupcopy' 'bkc'
'backupcopy' 'bkc'      string  (default: "auto")
                        global or local to buffer global-local
        When writing a file and a backup is made, this option tells how it's
        done.  This is a comma-separated list of words.

        The main values are:
        "yes"   make a copy of the file and overwrite the original one
        "no"    rename the file and write a new one
        "auto"  one of the previous, what works best

        Extra values that can be combined with the ones above are:
        "breaksymlink"  always break symlinks when writing
        "breakhardlink" always break hardlinks when writing

        Making a copy and overwriting the original file:
        - Takes extra time to copy the file.
        + When the file has special attributes, is a (hard/symbolic) link or
          has a resource fork, all this is preserved.
        - When the file is a link the backup will have the name of the link,
          not of the real file.

        Renaming the file and writing a new one:
        + It's fast.
        - Sometimes not all attributes of the file can be copied to the new
          file.
        - When the file is a link the new file will not be a link.

        The "auto" value is the middle way: When Vim sees that renaming the
        file is possible without side effects (the attributes can be passed on
        and the file is not a link) that is used.  When problems are expected,
        a copy will be made.

        The "breaksymlink" and "breakhardlink" values can be used in
        combination with any of "yes", "no" and "auto".  When included, they
        force Vim to always break either symbolic or hard links by doing
        exactly what the "no" option does, renaming the original file to
        become the backup and writing a new file in its place.  This can be
        useful for example in source trees where all the files are symbolic or
        hard links and any changes should stay in the local source tree, not
        be propagated back to the original source.
                                                        crontab
        One situation where "no" and "auto" will cause problems: A program
        that opens a file, invokes Vim to edit that file, and then tests if
        the open file was changed (through the file descriptor) will check the
        backup file instead of the newly created file.  "crontab -e" is an
        example.

        When a copy is made, the original file is truncated and then filled
        with the new text.  This means that protection bits, owner and
        symbolic links of the original file are unmodified.  The backup file,
        however, is a new file, owned by the user who edited the file.  The
        group of the backup is set to the group of the original file.  If this
        fails, the protection bits for the group are made the same as for
        others.

        When the file is renamed, this is the other way around: The backup has
        the same attributes of the original file, and the newly written file
        is owned by the current user.  When the file was a (hard/symbolic)
        link, the new file will not!  That's why the "auto" value doesn't
        rename when the file is a link.  The owner and group of the newly
        written file will be set to the same ones as the original file, but
        the system may refuse to do this.  In that case the "auto" value will
        again not rename the file.

                                                'backupdir' 'bdir'
'backupdir' 'bdir'      string  (default ".,$XDG_STATE_HOME/nvim/backup//")
                        global
        List of directories for the backup file, separated with commas.
        - The backup file will be created in the first directory in the list
          where this is possible.  If none of the directories exist Nvim will
          attempt to create the last directory in the list.
        - Empty means that no backup file will be created ('patchmode' is
          impossible!).  Writing may fail because of this.
        - A directory "." means to put the backup file in the same directory
          as the edited file.
        - A directory starting with "./" (or ".\" for MS-Windows) means to put
          the backup file relative to where the edited file is.  The leading
          "." is replaced with the path name of the edited file.
          ("." inside a directory name has no special meaning).
        - Spaces after the comma are ignored, other spaces are considered part
          of the directory name.  To have a space at the start of a directory
          name, precede it with a backslash.
        - To include a comma in a directory name precede it with a backslash.
        - A directory name may end in an '/'.
        - For Unix and Win32, if a directory ends in two path separators "//",
          the swap file name will be built from the complete path to the file
          with all path separators changed to percent '%' signs. This will
          ensure file name uniqueness in the backup directory.
          On Win32, it is also possible to end with "\\".  However, When a
          separating comma is following, you must use "//", since "\\" will
          include the comma in the file name. Therefore it is recommended to
          use '//', instead of '\\'.
        - Environment variables are expanded :set_env.
        - Careful with '\' characters, type one before a space, type two to
          get one in the option (see option-backslash), for example: 
            :set bdir=c:\\tmp,\ dir\\,with\\,commas,\\\ dir\ with\ spaces
       - For backwards compatibility with Vim version 3.0 a '>' at the start
          of the option is removed.
        See also 'backup' and 'writebackup' options.
        If you want to hide your backup files on Unix, consider this value: 
                :set backupdir=./.backup,~/.backup,.,/tmp
       You must create a ".backup" directory in each directory and in your
        home directory for this to work properly.
        The use of :set+= and :set-= is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'backupext' 'bex' E589
'backupext' 'bex'       string  (default "~")
                        global
        String which is appended to a file name to make the name of the
        backup file.  The default is quite unusual, because this avoids
        accidentally overwriting existing files with a backup file.  You might
        prefer using ".bak", but make sure that you don't have files with
        ".bak" that you want to keep.
        Only normal file name characters can be used; "/\*?[|<>" are illegal.

        If you like to keep a lot of backups, you could use a BufWritePre
        autocommand to change 'backupext' just before writing the file to
        include a timestamp. 
                :au BufWritePre * let &bex = '-' .. strftime("%Y%b%d%X") .. '~'
       Use 'backupdir' to put the backup in a different directory.

                                                'backupskip' 'bsk'
'backupskip' 'bsk'      string  (default: "$TMPDIR/*,$TMP/*,$TEMP/*"
                                 Unix: "/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*"
                                 Mac: "/private/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*")
                        global
        A list of file patterns.  When one of the patterns matches with the
        name of the file which is written, no backup file is created.  Both
        the specified file name and the full path name of the file are used.
        The pattern is used like with :autocmd, see autocmd-pattern.
        Watch out for special characters, see option-backslash.
        When $TMPDIR, $TMP or $TEMP is not defined, it is not used for the
        default value.  "/tmp/*" is only used for Unix.

        WARNING: Not having a backup file means that when Vim fails to write
        your buffer correctly and then, for whatever reason, Vim exits, you
        lose both the original file and what you were writing.  Only disable
        backups if you don't care about losing the file.

        Note that environment variables are not expanded.  If you want to use
        $HOME you must expand it explicitly, e.g.: 
                :let &backupskip = escape(expand('$HOME'), '\') .. '/tmp/*'

       Note that the default also makes sure that "crontab -e" works (when a
        backup would be made by renaming the original file crontab won't see
        the newly created file).  Also see 'backupcopy' and crontab.

                                                'belloff' 'bo'
'belloff' 'bo'          string  (default "all")
                        global
        Specifies for which events the bell will not be rung. It is a comma-
        separated list of items. For each item that is present, the bell
        will be silenced. This is most useful to specify specific events in
        insert mode to be silenced.

        item        meaning when present        
        all         All events.
        backspace   When hitting <BS> or <Del> and deleting results in an
                    error.
        cursor      Fail to move around using the cursor keys or
                    <PageUp>/<PageDown> in Insert-mode.
        complete    Error occurred when using i_CTRL-X_CTRL-K or
                    i_CTRL-X_CTRL-T.
        copy        Cannot copy char from insert mode using i_CTRL-Y or
                    i_CTRL-E.
        ctrlg       Unknown Char after <C-G> in Insert mode.
        error       Other Error occurred (e.g. try to join last line)
                    (mostly used in Normal-mode or Cmdline-mode).
        esc         hitting <Esc> in Normal-mode.
        hangul      Ignored.
        lang        Calling the beep module for Lua/Mzscheme/TCL.
        mess        No output available for g<.
        showmatch   Error occurred for 'showmatch' function.
        operator    Empty region error cpo-E.
        register    Unknown register after <C-R> in Insert-mode.
        shell       Bell from shell output :!.
        spell       Error happened on spell suggest.
        wildmode    More matches in cmdline-completion available
                    (depends on the 'wildmode' setting).

        This is most useful to fine tune when in Insert mode the bell should
        be rung. For Normal mode and Ex commands, the bell is often rung to
        indicate that an error occurred. It can be silenced by adding the
        "error" keyword.

                                     'binary' 'bin' 'nobinary' 'nobin'
'binary' 'bin'          boolean (default off)
                        local to buffer
        This option should be set before editing a binary file.  You can also
        use the -b Vim argument.  When this option is switched on a few
        options will be changed (also when it already was on):
                'textwidth'  will be set to 0
                'wrapmargin' will be set to 0
                'modeline'   will be off
                'expandtab'  will be off
        Also, 'fileformat' and 'fileformats' options will not be used, the
        file is read and written like 'fileformat' was "unix" (a single <NL>
        separates lines).
        The 'fileencoding' and 'fileencodings' options will not be used, the
        file is read without conversion.
        NOTE: When you start editing a(nother) file while the 'bin' option is
        on, settings from autocommands may change the settings again (e.g.,
        'textwidth'), causing trouble when editing.  You might want to set
        'bin' again when the file has been loaded.
        The previous values of these options are remembered and restored when
        'bin' is switched from on to off.  Each buffer has its own set of
        saved option values.
        To edit a file with 'binary' set you can use the ++bin argument.
        This avoids you have to do ":set bin", which would have effect for all
        files you edit.
        When writing a file the <EOL> for the last line is only written if
        there was one in the original file (normally Vim appends an <EOL> to
        the last line if there is none; this would make the file longer).  See
        the 'endofline' option.

                                                        'bomb' 'nobomb'
'bomb'                  boolean (default off)
                        local to buffer
        When writing a file and the following conditions are met, a BOM (Byte
        Order Mark) is prepended to the file:
        - this option is on
        - the 'binary' option is off
        - 'fileencoding' is "utf-8", "ucs-2", "ucs-4" or one of the little/big
          endian variants.
        Some applications use the BOM to recognize the encoding of the file.
        Often used for UCS-2 files on MS-Windows.  For other applications it
        causes trouble, for example: "cat file1 file2" makes the BOM of file2
        appear halfway through the resulting file.  Gcc doesn't accept a BOM.
        When Vim reads a file and 'fileencodings' starts with "ucs-bom", a
        check for the presence of the BOM is done and 'bomb' set accordingly.
        Unless 'binary' is set, it is removed from the first line, so that you
        don't see it when editing.  When you don't change the options, the BOM
        will be restored when writing the file.

                                                'breakat' 'brk'
'breakat' 'brk'         string  (default " ^I!@*-+;:,./?")
                        global
        This option lets you choose which characters might cause a line
        break if 'linebreak' is on.  Only works for ASCII characters.

                        'breakindent' 'bri' 'nobreakindent' 'nobri'
'breakindent' 'bri'     boolean (default off)
                        local to window
        Every wrapped line will continue visually indented (same amount of
        space as the beginning of that line), thus preserving horizontal blocks
        of text.

                                                'breakindentopt' 'briopt'
'breakindentopt' 'briopt' string (default empty)
                        local to window
        Settings for 'breakindent'. It can consist of the following optional
        items and must be separated by a comma:
                min:{n}     Minimum text width that will be kept after
                            applying 'breakindent', even if the resulting
                            text should normally be narrower. This prevents
                            text indented almost to the right window border
                            occupying lot of vertical space when broken.
                shift:{n}   After applying 'breakindent', the wrapped line's
                            beginning will be shifted by the given number of
                            characters.  It permits dynamic French paragraph
                            indentation (negative) or emphasizing the line
                            continuation (positive).
                sbr         Display the 'showbreak' value before applying the
                            additional indent.
                list:{n}    Adds an additional indent for lines that match a
                            numbered or bulleted list (using the
                            'formatlistpat' setting).
                list:-1     Uses the length of a match with 'formatlistpat'
                            for indentation.
        The default value for min is 20, shift and list is 0.

                                                'browsedir' 'bsdir'
'browsedir' 'bsdir'     string  (default: "last")
                        global
        Which directory to use for the file browser:
           last         Use same directory as with last file browser, where a
                        file was opened or saved.
           buffer       Use the directory of the related buffer.
           current      Use the current directory.
           {path}       Use the specified directory

                                                'bufhidden' 'bh'
'bufhidden' 'bh'        string (default: "")
                        local to buffer
        This option specifies what happens when a buffer is no longer
        displayed in a window:
          <empty>       follow the global 'hidden' option
          hide          hide the buffer (don't unload it), even if 'hidden' is
                        not set
          unload        unload the buffer, even if 'hidden' is set; the
                        :hide command will also unload the buffer
          delete        delete the buffer from the buffer list, even if
                        'hidden' is set; the :hide command will also delete
                        the buffer, making it behave like :bdelete
          wipe          wipe the buffer from the buffer list, even if
                        'hidden' is set; the :hide command will also wipe
                        out the buffer, making it behave like :bwipeout

        CAREFUL: when "unload", "delete" or "wipe" is used changes in a buffer
        are lost without a warning.  Also, these values may break autocommands
        that switch between buffers temporarily.
        This option is used together with 'buftype' and 'swapfile' to specify
        special kinds of buffers.   See special-buffers.

                        'buflisted' 'bl' 'nobuflisted' 'nobl' E85
'buflisted' 'bl'        boolean (default: on)
                        local to buffer
        When this option is set, the buffer shows up in the buffer list.  If
        it is reset it is not used for ":bnext", "ls", the Buffers menu, etc.
        This option is reset by Vim for buffers that are only used to remember
        a file name or marks.  Vim sets it when starting to edit a buffer.
        But not when moving to a buffer with ":buffer".

                                                'buftype' 'bt' E382
'buftype' 'bt'          string (default: "")
                        local to buffer
        The value of this option specifies the type of a buffer:
          <empty>       normal buffer
          acwrite       buffer will always be written with BufWriteCmds
          help          help buffer (do not set this manually)
          nofile        buffer is not related to a file, will not be written
          nowrite       buffer will not be written
          quickfix      list of errors :cwindow or locations :lwindow
          terminal      terminal-emulator buffer
          prompt        buffer where only the last line can be edited, meant
                        to be used by a plugin, see prompt-buffer

        This option is used together with 'bufhidden' and 'swapfile' to
        specify special kinds of buffers.   See special-buffers.
        Also see win_gettype(), which returns the type of the window.

        Be careful with changing this option, it can have many side effects!
        One such effect is that Vim will not check the timestamp of the file,
        if the file is changed by another program this will not be noticed.

        A "quickfix" buffer is only used for the error list and the location
        list.  This value is set by the :cwindow and :lwindow commands and
        you are not supposed to change it.

        "nofile" and "nowrite" buffers are similar:
        both:           The buffer is not to be written to disk, ":w" doesn't
                        work (":w filename" does work though).
        both:           The buffer is never considered to be 'modified'.
                        There is no warning when the changes will be lost, for
                        example when you quit Vim.
        both:           A swap file is only created when using too much memory
                        (when 'swapfile' has been reset there is never a swap
                        file).
        nofile only:    The buffer name is fixed, it is not handled like a
                        file name.  It is not modified in response to a :cd
                        command.
        both:           When using ":e bufname" and already editing "bufname"
                        the buffer is made empty and autocommands are
                        triggered as usual for :edit.
                                                        E676
        "acwrite" implies that the buffer name is not related to a file, like
        "nofile", but it will be written.  Thus, in contrast to "nofile" and
        "nowrite", ":w" does work and a modified buffer can't be abandoned
        without saving.  For writing there must be matching BufWriteCmd,
        FileWriteCmd or FileAppendCmd autocommands.

                                                'casemap' 'cmp'
'casemap' 'cmp'         string  (default: "internal,keepascii")
                        global
        Specifies details about changing the case of letters.  It may contain
        these words, separated by a comma:
        internal        Use internal case mapping functions, the current
                        locale does not change the case mapping. When
                        "internal" is omitted, the towupper() and towlower()
                        system library functions are used when available.
        keepascii       For the ASCII characters (0x00 to 0x7f) use the US
                        case mapping, the current locale is not effective.
                        This probably only matters for Turkish.

                                                'cdhome' 'cdh'
'cdhome' 'cdh'          boolean (default: off)
                        global
        When on, :cd, :tcd and :lcd without an argument changes the
        current working directory to the $HOME directory like in Unix.
        When off, those commands just print the current directory name.
        On Unix this option has no effect.

                                                'cdpath' 'cd' E344 E346
'cdpath' 'cd'           string  (default: equivalent to $CDPATH or ",,")
                        global
        This is a list of directories which will be searched when using the
        :cd, :tcd and :lcd commands, provided that the directory being
        searched for has a relative path, not an absolute part starting with
        "/", "./" or "../", the 'cdpath' option is not used then.
        The 'cdpath' option's value has the same form and semantics as
        'path'.  Also see file-searching.
        The default value is taken from $CDPATH, with a "," prepended to look
        in the current directory first.
        If the default value taken from $CDPATH is not what you want, include
        a modified version of the following command in your vimrc file to
        override it: 
          :let &cdpath = ',' .. substitute(substitute($CDPATH, '[, ]', '\\\0', 'g'), ':', ',', 'g')
       This option cannot be set from a modeline or in the sandbox, for
        security reasons.
        (parts of 'cdpath' can be passed to the shell to expand file names).

                                                'cedit'
'cedit'                 string  (default: CTRL-F)
                        global
        The key used in Command-line Mode to open the command-line window.
        Only non-printable keys are allowed.
        The key can be specified as a single character, but it is difficult to
        type.  The preferred way is to use the <> notation.  Examples: 
                :exe "set cedit=\<C-Y>"
                :exe "set cedit=\<Esc>"
       Nvi also has this option, but it only uses the first character.
        See cmdwin.

                                                'channel'
'channel'               number (default: 0)
                        local to buffer
        channel connected to the buffer, or 0 if no channel is connected.
        In a :terminal buffer this is the terminal channel.
        Read-only.

                                'charconvert' 'ccv' E202 E214 E513
'charconvert' 'ccv'     string (default "")
                        global
        An expression that is used for character encoding conversion.  It is
        evaluated when a file that is to be read or has been written has a
        different encoding from what is desired.
        'charconvert' is not used when the internal iconv() function is
        supported and is able to do the conversion.  Using iconv() is
        preferred, because it is much faster.
        'charconvert' is not used when reading stdin --, because there is no
        file to convert from.  You will have to save the text in a file first.
        The expression must return zero, false or an empty string for success,
        non-zero or true for failure.
        See encoding-names for possible encoding names.
        Additionally, names given in 'fileencodings' and 'fileencoding' are
        used.
        Conversion between "latin1", "unicode", "ucs-2", "ucs-4" and "utf-8"
        is done internally by Vim, 'charconvert' is not used for this.
        Also used for Unicode conversion.
        Example: 
                set charconvert=CharConvert()
                fun CharConvert()
                  system("recode "
                        \ .. v:charconvert_from .. ".." .. v:charconvert_to
                        \ .. " <" .. v:fname_in .. " >" .. v:fname_out)
                  return v:shell_error
                endfun
       The related Vim variables are:
                v:charconvert_from      name of the current encoding
                v:charconvert_to        name of the desired encoding
                v:fname_in              name of the input file
                v:fname_out             name of the output file
        Note that v:fname_in and v:fname_out will never be the same.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                   'cindent' 'cin' 'nocindent' 'nocin'
'cindent' 'cin'         boolean (default off)
                        local to buffer
        Enables automatic C program indenting.  See 'cinkeys' to set the keys
        that trigger reindenting in insert mode and 'cinoptions' to set your
        preferred indent style.
        If 'indentexpr' is not empty, it overrules 'cindent'.
        If 'lisp' is not on and both 'indentexpr' and 'equalprg' are empty,
        the "=" operator indents using this algorithm rather than calling an
        external program.
        See C-indenting.
        When you don't like the way 'cindent' works, try the 'smartindent'
        option or 'indentexpr'.
        This option is not used when 'paste' is set.

                                                        'cinkeys' 'cink'
'cinkeys' 'cink'        string  (default "0{,0},0),0],:,0#,!^F,o,O,e")
                        local to buffer
        A list of keys that, when typed in Insert mode, cause reindenting of
        the current line.  Only used if 'cindent' is on and 'indentexpr' is
        empty.
        For the format of this option see cinkeys-format.
        See C-indenting.

                                                'cinoptions' 'cino'
'cinoptions' 'cino'     string  (default "")
                        local to buffer
        The 'cinoptions' affect the way 'cindent' reindents lines in a C
        program.  See cinoptions-values for the values of this option, and
        C-indenting for info on C indenting in general.


                                                'cinwords' 'cinw'
'cinwords' 'cinw'       string  (default "if,else,while,do,for,switch")
                        local to buffer
        These keywords start an extra indent in the next line when
        'smartindent' or 'cindent' is set.  For 'cindent' this is only done at
        an appropriate place (inside {}).
        Note that 'ignorecase' isn't used for 'cinwords'.  If case doesn't
        matter, include the keyword both the uppercase and lowercase:
        "if,If,IF".

                                                'cinscopedecls' 'cinsd'
'cinscopedecls' 'cinsd' string  (default "public,protected,private")
                        local to buffer
        Keywords that are interpreted as a C++ scope declaration by cino-g.
        Useful e.g. for working with the Qt framework that defines additional
        scope declarations "signals", "public slots" and "private slots": 
                set cinscopedecls+=signals,public\ slots,private\ slots

                                               'clipboard' 'cb'
'clipboard' 'cb'        string  (default "")
                        global
        This option is a list of comma-separated names.
        These names are recognized:

                                                clipboard-unnamed
        unnamed         When included, Vim will use the clipboard register '*'
                        for all yank, delete, change and put operations which
                        would normally go to the unnamed register.  When a
                        register is explicitly specified, it will always be
                        used regardless of whether "unnamed" is in 'clipboard'
                        or not.  The clipboard register can always be
                        explicitly accessed using the "* notation.  Also see
                        clipboard.

                                                clipboard-unnamedplus
        unnamedplus     A variant of the "unnamed" flag which uses the
                        clipboard register '+' (quoteplus) instead of
                        register '*' for all yank, delete, change and put
                        operations which would normally go to the unnamed
                        register.  When "unnamed" is also included to the
                        option, yank and delete operations (but not put)
                        will additionally copy the text into register
                        '*'. See clipboard.

                                                'cmdheight' 'ch'
'cmdheight' 'ch'        number  (default 1)
                        global or local to tab page
        Number of screen lines to use for the command-line.  Helps avoiding
        hit-enter prompts.
        The value of this option is stored with the tab page, so that each tab
        page can have a different value.

        When 'cmdheight' is zero, there is no command-line unless it is being
        used.  The command-line will cover the last line of the screen when
        shown.

        WARNING: cmdheight=0 is considered experimental. Expect some
        unwanted behaviour. Some 'shortmess' flags and similar
        mechanism might fail to take effect, causing unwanted hit-enter
        prompts.  Some informative messages, both from Nvim itself and
        plugins, will not be displayed.

                                                'cmdwinheight' 'cwh'
'cmdwinheight' 'cwh'    number  (default 7)
                        global
        Number of screen lines to use for the command-line window. cmdwin

                                                'colorcolumn' 'cc'
'colorcolumn' 'cc'      string  (default "")
                        local to window
        'colorcolumn' is a comma-separated list of screen columns that are
        highlighted with ColorColumn hl-ColorColumn.  Useful to align
        text.  Will make screen redrawing slower.
        The screen column can be an absolute number, or a number preceded with
        '+' or '-', which is added to or subtracted from 'textwidth'. 

                :set cc=+1  " highlight column after 'textwidth'
                :set cc=+1,+2,+3  " highlight three columns after 'textwidth'
                :hi ColorColumn ctermbg=lightgrey guibg=lightgrey

        When 'textwidth' is zero then the items with '-' and '+' are not used.
        A maximum of 256 columns are highlighted.

                                                'columns' 'co' E594
'columns' 'co'          number  (default 80 or terminal width)
                        global
        Number of columns of the screen.  Normally this is set by the terminal
        initialization and does not have to be set by hand.
        When Vim is running in the GUI or in a resizable window, setting this
        option will cause the window size to be changed.  When you only want
        to use the size for the GUI, put the command in your ginit.vim file.
        When you set this option and Vim is unable to change the physical
        number of columns of the display, the display may be messed up.  For
        the GUI it is always possible and Vim limits the number of columns to
        what fits on the screen.  You can use this command to get the widest
        window possible: 
                :set columns=9999
       Minimum value is 12, maximum value is 10000.

                                        'comments' 'com' E524 E525
'comments' 'com'        string  (default
                                "s1:/*,mb:*,ex:*/,://,b:#,:%,:XCOMM,n:>,fb:-")
                        local to buffer
        A comma-separated list of strings that can start a comment line.  See
        format-comments.  See option-backslash about using backslashes to
        insert a space.

                                        'commentstring' 'cms' E537
'commentstring' 'cms'   string  (default "/*%s*/")
                        local to buffer
        A template for a comment.  The "%s" in the value is replaced with the
        comment text.  Currently only used to add markers for folding, see
        fold-marker.

                                                'complete' 'cpt' E535
'complete' 'cpt'        string  (default: ".,w,b,u,t")
                        local to buffer
        This option specifies how keyword completion ins-completion works
        when CTRL-P or CTRL-N are used.  It is also used for whole-line
        completion i_CTRL-X_CTRL-L.  It indicates the type of completion
        and the places to scan.  It is a comma-separated list of flags:
        .       scan the current buffer ('wrapscan' is ignored)
        w       scan buffers from other windows
        b       scan other loaded buffers that are in the buffer list
        u       scan the unloaded buffers that are in the buffer list
        U       scan the buffers that are not in the buffer list
        k       scan the files given with the 'dictionary' option
        kspell  use the currently active spell checking spell
        k{dict} scan the file {dict}.  Several "k" flags can be given,
                patterns are valid too.  For example: 
                        :set cpt=k/usr/dict/*,k~/spanish
       s       scan the files given with the 'thesaurus' option
        s{tsr}  scan the file {tsr}.  Several "s" flags can be given, patterns
                are valid too.
        i       scan current and included files
        d       scan current and included files for defined name or macro
                i_CTRL-X_CTRL-D
        ]       tag completion
        t       same as "]"

        Unloaded buffers are not loaded, thus their autocmds :autocmd are
        not executed, this may lead to unexpected completions from some files
        (gzipped files for example).  Unloaded buffers are not scanned for
        whole-line completion.

        As you can see, CTRL-N and CTRL-P can be used to do any 'iskeyword'-
        based expansion (e.g., dictionary i_CTRL-X_CTRL-K, included patterns
        i_CTRL-X_CTRL-I, tags i_CTRL-X_CTRL-] and normal expansions).

                                                'completefunc' 'cfu'
'completefunc' 'cfu'    string  (default: empty)
                        local to buffer
        This option specifies a function to be used for Insert mode completion
        with CTRL-X CTRL-U. i_CTRL-X_CTRL-U
        See complete-functions for an explanation of how the function is
        invoked and what it should return.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'completeslash' 'csl'
'completeslash' 'csl'   string  (default: "")
                        local to buffer
                        {only for MS-Windows}
        When this option is set it overrules 'shellslash' for completion:
        - When this option is set to "slash", a forward slash is used for path
          completion in insert mode. This is useful when editing HTML tag, or
          Makefile with 'noshellslash' on MS-Windows.
        - When this option is set to "backslash", backslash is used. This is
          useful when editing a batch file with 'shellslash' set on MS-Windows.
        - When this option is empty, same character is used as for
          'shellslash'.
        For Insert mode completion the buffer-local value is used.  For
        command line completion the global value is used.

                                                'completeopt' 'cot'
'completeopt' 'cot'     string  (default: "menu,preview")
                        global
        A comma-separated list of options for Insert mode completion
        ins-completion.  The supported values are:

           menu     Use a popup menu to show the possible completions.  The
                    menu is only shown when there is more than one match and
                    sufficient colors are available.  ins-completion-menu

           menuone  Use the popup menu also when there is only one match.
                    Useful when there is additional information about the
                    match, e.g., what file it comes from.

           longest  Only insert the longest common text of the matches.  If
                    the menu is displayed you can use CTRL-L to add more
                    characters.  Whether case is ignored depends on the kind
                    of completion.  For buffer text the 'ignorecase' option is
                    used.

           preview  Show extra information about the currently selected
                    completion in the preview window.  Only works in
                    combination with "menu" or "menuone".

          noinsert  Do not insert any text for a match until the user selects
                    a match from the menu. Only works in combination with
                    "menu" or "menuone". No effect if "longest" is present.

          noselect  Do not select a match in the menu, force the user to
                    select one from the menu. Only works in combination with
                    "menu" or "menuone".


                                                'concealcursor' 'cocu'
'concealcursor' 'cocu'  string (default: "")
                        local to window
        Sets the modes in which text in the cursor line can also be concealed.
        When the current mode is listed then concealing happens just like in
        other lines.
          n             Normal mode
          v             Visual mode
          i             Insert mode
          c             Command line editing, for 'incsearch'

        'v' applies to all lines in the Visual area, not only the cursor.
        A useful value is "nc".  This is used in help files.  So long as you
        are moving around text is concealed, but when starting to insert text
        or selecting a Visual area the concealed text is displayed, so that
        you can see what you are doing.
        Keep in mind that the cursor position is not always where it's
        displayed.  E.g., when moving vertically it may change column.


                                                'conceallevel' 'cole'
'conceallevel' 'cole'   number (default 0)
                        local to window
        Determine how text with the "conceal" syntax attribute :syn-conceal
        is shown:

        Value           Effect 
        0               Text is shown normally
        1               Each block of concealed text is replaced with one
                        character.  If the syntax item does not have a custom
                        replacement character defined (see :syn-cchar) the
                        character defined in 'listchars' is used.
                        It is highlighted with the "Conceal" highlight group.
        2               Concealed text is completely hidden unless it has a
                        custom replacement character defined (see
                        :syn-cchar).
        3               Concealed text is completely hidden.

        Note: in the cursor line concealed text is not hidden, so that you can
        edit and copy the text.  This can be changed with the 'concealcursor'
        option.

                                'confirm' 'cf' 'noconfirm' 'nocf'
'confirm' 'cf'          boolean (default off)
                        global
        When 'confirm' is on, certain operations that would normally
        fail because of unsaved changes to a buffer, e.g. ":q" and ":e",
        instead raise a dialog asking if you wish to save the current
        file(s).  You can still use a ! to unconditionally abandon a buffer.
        If 'confirm' is off you can still activate confirmation for one
        command only (this is most useful in mappings) with the :confirm
        command.
        Also see the confirm() function and the 'v' flag in 'guioptions'.

                        'copyindent' 'ci' 'nocopyindent' 'noci'
'copyindent' 'ci'       boolean (default off)
                        local to buffer
        Copy the structure of the existing lines indent when autoindenting a
        new line.  Normally the new indent is reconstructed by a series of
        tabs followed by spaces as required (unless 'expandtab' is enabled,
        in which case only spaces are used).  Enabling this option makes the
        new line copy whatever characters were used for indenting on the
        existing line.  'expandtab' has no effect on these characters, a Tab
        remains a Tab.  If the new indent is greater than on the existing
        line, the remaining space is filled in the normal manner.
        See 'preserveindent'.

                                                'cpoptions' 'cpo' cpo
'cpoptions' 'cpo'       string  (default: "aABceFs_")
                        global
        A sequence of single character flags.  When a character is present
        this indicates Vi-compatible behavior.  This is used for things where
        not being Vi-compatible is mostly or sometimes preferred.
        'cpoptions' stands for "compatible-options".
        Commas can be added for readability.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" add-option-flags.

            contains    behavior        
                                                                cpo-a
                a       When included, a ":read" command with a file name
                        argument will set the alternate file name for the
                        current window.
                                                                cpo-A
                A       When included, a ":write" command with a file name
                        argument will set the alternate file name for the
                        current window.
                                                                cpo-b
                b       "\|" in a ":map" command is recognized as the end of
                        the map command.  The '\' is included in the mapping,
                        the text after the '|' is interpreted as the next
                        command.  Use a CTRL-V instead of a backslash to
                        include the '|' in the mapping.  Applies to all
                        mapping, abbreviation, menu and autocmd commands.
                        See also map_bar.
                                                                cpo-B
                B       A backslash has no special meaning in mappings,
                        abbreviations, user commands and the "to" part of the
                        menu commands.  Remove this flag to be able to use a
                        backslash like a CTRL-V.  For example, the command
                        ":map X \<Esc>" results in X being mapped to:
                                'B' included:   "\^["    (^[ is a real <Esc>)
                                'B' excluded:   "<Esc>"  (5 characters)
                                                                cpo-c
                c       Searching continues at the end of any match at the
                        cursor position, but not further than the start of the
                        next line.  When not present searching continues
                        one character from the cursor position.  With 'c'
                        "abababababab" only gets three matches when repeating
                        "/abab", without 'c' there are five matches.
                                                                cpo-C
                C       Do not concatenate sourced lines that start with a
                        backslash.  See line-continuation.
                                                                cpo-d
                d       Using "./" in the 'tags' option doesn't mean to use
                        the tags file relative to the current file, but the
                        tags file in the current directory.
                                                                cpo-D
                D       Can't use CTRL-K to enter a digraph after Normal mode
                        commands with a character argument, like r, f and
                        t.
                                                                cpo-e
                e       When executing a register with ":@r", always add a
                        <CR> to the last line, also when the register is not
                        linewise.  If this flag is not present, the register
                        is not linewise and the last line does not end in a
                        <CR>, then the last line is put on the command-line
                        and can be edited before hitting <CR>.
                                                                cpo-E
                E       It is an error when using "y", "d", "c", "g~", "gu" or
                        "gU" on an Empty region.  The operators only work when
                        at least one character is to be operated on.  Example:
                        This makes "y0" fail in the first column.
                                                                cpo-f
                f       When included, a ":read" command with a file name
                        argument will set the file name for the current buffer,
                        if the current buffer doesn't have a file name yet.
                                                                cpo-F
                F       When included, a ":write" command with a file name
                        argument will set the file name for the current
                        buffer, if the current buffer doesn't have a file name
                        yet.  Also see cpo-P.
                                                                cpo-i
                i       When included, interrupting the reading of a file will
                        leave it modified.
                                                                cpo-I
                I       When moving the cursor up or down just after inserting
                        indent for 'autoindent', do not delete the indent.
                                                                cpo-J
                J       A sentence has to be followed by two spaces after
                        the '.', '!' or '?'.  A <Tab> is not recognized as
                        white space.
                                                                cpo-K
                K       Don't wait for a key code to complete when it is
                        halfway through a mapping.  This breaks mapping
                        <F1><F1> when only part of the second <F1> has been
                        read.  It enables cancelling the mapping by typing
                        <F1><Esc>.
                                                                cpo-l
                l       Backslash in a [] range in a search pattern is taken
                        literally, only "\]", "\^", "\-" and "\\" are special.
                        See /[]
                           'l' included: "/[ \t]"  finds <Space>, '\' and 't'
                           'l' excluded: "/[ \t]"  finds <Space> and <Tab>
                                                                cpo-L
                L       When the 'list' option is set, 'wrapmargin',
                        'textwidth', 'softtabstop' and Virtual Replace mode
                        (see gR) count a <Tab> as two characters, instead of
                        the normal behavior of a <Tab>.
                                                                cpo-m
                m       When included, a showmatch will always wait half a
                        second.  When not included, a showmatch will wait half
                        a second or until a character is typed.  'showmatch'
                                                                cpo-M
                M       When excluded, "%" matching will take backslashes into
                        account.  Thus in "( \( )" and "\( ( \)" the outer
                        parenthesis match.  When included "%" ignores
                        backslashes, which is Vi compatible.
                                                                cpo-n
                n       When included, the column used for 'number' and
                        'relativenumber' will also be used for text of wrapped
                        lines.
                                                                cpo-o
                o       Line offset to search command is not remembered for
                        next search.
                                                                cpo-O
                O       Don't complain if a file is being overwritten, even
                        when it didn't exist when editing it.  This is a
                        protection against a file unexpectedly created by
                        someone else.  Vi didn't complain about this.
                                                                cpo-p
                p       Vi compatible Lisp indenting.  When not present, a
                        slightly better algorithm is used.
                                                                cpo-P
                P       When included, a ":write" command that appends to a
                        file will set the file name for the current buffer, if
                        the current buffer doesn't have a file name yet and
                        the 'F' flag is also included cpo-F.
                                                                cpo-q
                q       When joining multiple lines leave the cursor at the
                        position where it would be when joining two lines.
                                                                cpo-r
                r       Redo ("." command) uses "/" to repeat a search
                        command, instead of the actually used search string.
                                                                cpo-R
                R       Remove marks from filtered lines.  Without this flag
                        marks are kept like :keepmarks was used.
                                                                cpo-s
                s       Set buffer options when entering the buffer for the
                        first time.  This is like it is in Vim version 3.0.
                        And it is the default.  If not present the options are
                        set when the buffer is created.
                                                                cpo-S
                S       Set buffer options always when entering a buffer
                        (except 'readonly', 'fileformat', 'filetype' and
                        'syntax').  This is the (most) Vi compatible setting.
                        The options are set to the values in the current
                        buffer.  When you change an option and go to another
                        buffer, the value is copied.  Effectively makes the
                        buffer options global to all buffers.

                        's'    'S'     copy buffer options
                        no     no      when buffer created
                        yes    no      when buffer first entered (default)
                         X     yes     each time when buffer entered (vi comp.)
                                                                cpo-t
                t       Search pattern for the tag command is remembered for
                        "n" command.  Otherwise Vim only puts the pattern in
                        the history for search pattern, but doesn't change the
                        last used search pattern.
                                                                cpo-u
                u       Undo is Vi compatible.  See undo-two-ways.
                                                                cpo-v
                v       Backspaced characters remain visible on the screen in
                        Insert mode.  Without this flag the characters are
                        erased from the screen right away.  With this flag the
                        screen newly typed text overwrites backspaced
                        characters.
                                                                cpo-W
                W       Don't overwrite a readonly file.  When omitted, ":w!"
                        overwrites a readonly file, if possible.
                                                                cpo-x
                x       <Esc> on the command-line executes the command-line.
                        The default in Vim is to abandon the command-line,
                        because <Esc> normally aborts a command.  c_<Esc>
                                                                cpo-X
                X       When using a count with "R" the replaced text is
                        deleted only once.  Also when repeating "R" with "."
                        and a count.
                                                                cpo-y
                y       A yank command can be redone with ".".  Think twice if
                        you really want to use this, it may break some
                        plugins, since most people expect "." to only repeat a
                        change.
                                                                cpo-Z
                Z       When using "w!" while the 'readonly' option is set,
                        don't reset 'readonly'.
                                                                cpo-!
                !       When redoing a filter command, use the last used
                        external command, whatever it was.  Otherwise the last
                        used -filter- command is used.
                                                                cpo-$
                $       When making a change to one line, don't redisplay the
                        line, but put a '$' at the end of the changed text.
                        The changed text will be overwritten when you type the
                        new text.  The line is redisplayed if you type any
                        command that moves the cursor from the insertion
                        point.
                                                                cpo-%
                %       Vi-compatible matching is done for the "%" command.
                        Does not recognize "#if", "#endif", etc.
                        Does not recognize "/*" and "*/".
                        Parens inside single and double quotes are also
                        counted, causing a string that contains a paren to
                        disturb the matching.  For example, in a line like
                        "if (strcmp("foo(", s))" the first paren does not
                        match the last one.  When this flag is not included,
                        parens inside single and double quotes are treated
                        specially.  When matching a paren outside of quotes,
                        everything inside quotes is ignored.  When matching a
                        paren inside quotes, it will find the matching one (if
                        there is one).  This works very well for C programs.
                        This flag is also used for other features, such as
                        C-indenting.
                                                                cpo-+
                +       When included, a ":write file" command will reset the
                        'modified' flag of the buffer, even though the buffer
                        itself may still be different from its file.
                                                                cpo->
                >       When appending to a register, put a line break before
                        the appended text.
                                                                cpo-;
                ;       When using , or ; to repeat the last t search
                        and the cursor is right in front of the searched
                        character, the cursor won't move. When not included,
                        the cursor would skip over it and jump to the
                        following occurrence.
                                                                cpo-_
                _       When using cw on a word, do not include the
                        whitespace following the word in the motion.

                                                'cscopepathcomp' 'cspc'
'cscopepathcomp' 'cspc' number  (default 0)
                        global
        Determines how many components of the path to show in a list of tags.
        See cscopepathcomp.

                                                'cscopeprg' 'csprg'
'cscopeprg' 'csprg'     string  (default "cscope")
                        global
        Specifies the command to execute cscope.  See cscopeprg.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'cscopequickfix' 'csqf'
'cscopequickfix' 'csqf' string  (default "")
                        global
        Specifies whether to use quickfix window to show cscope results.
        See cscopequickfix.

                'cscoperelative' 'csre' 'nocscoperelative' 'nocsre'
'cscoperelative' 'csre' boolean (default off)
                        global
        In the absence of a prefix (-P) for cscope. setting this option enables
        to use the basename of cscope.out path as the prefix.
        See cscoperelative.

                                'cscopetag' 'cst' 'nocscopetag' 'nocst'
'cscopetag' 'cst'       boolean (default off)
                        global
        Use cscope for tag commands.  See cscope-options.

                                                'cscopetagorder' 'csto'
'cscopetagorder' 'csto' number  (default 0)
                        global
        Determines the order in which ":cstag" performs a search.  See
        cscopetagorder.

                        'cursorbind' 'crb' 'nocursorbind' 'nocrb'
'cursorbind' 'crb'      boolean  (default off)
                        local to window
        When this option is set, as the cursor in the current
        window moves other cursorbound windows (windows that also have
        this option set) move their cursors to the corresponding line and
        column.  This option is useful for viewing the
        differences between two versions of a file (see 'diff'); in diff mode,
        inserted and deleted lines (though not characters within a line) are
        taken into account.


                        'cursorcolumn' 'cuc' 'nocursorcolumn' 'nocuc'
'cursorcolumn' 'cuc'    boolean (default off)
                        local to window
        Highlight the screen column of the cursor with CursorColumn
        hl-CursorColumn.  Useful to align text.  Will make screen redrawing
        slower.
        If you only want the highlighting in the current window you can use
        these autocommands: 
                au WinLeave * set nocursorline nocursorcolumn
                au WinEnter * set cursorline cursorcolumn


                        'cursorline' 'cul' 'nocursorline' 'nocul'
'cursorline' 'cul'      boolean (default off)
                        local to window
        Highlight the text line of the cursor with CursorLine hl-CursorLine.
        Useful to easily spot the cursor.  Will make screen redrawing slower.
        When Visual mode is active the highlighting isn't used to make it
        easier to see the selected text.


                                                'cursorlineopt' 'culopt'
'cursorlineopt' 'culopt' string (default: "number,line")
                        local to window
        Comma-separated list of settings for how 'cursorline' is displayed.
        Valid values:
        "line"          Highlight the text line of the cursor with
                        CursorLine hl-CursorLine.
        "screenline"    Highlight only the screen line of the cursor with
                        CursorLine hl-CursorLine.
        "number"        Highlight the line number of the cursor with
                        CursorLineNr hl-CursorLineNr.

        Special value:
        "both"          Alias for the values "line,number".

        "line" and "screenline" cannot be used together.


                                                'debug'
'debug'                 string  (default "")
                        global
        These values can be used:
        msg     Error messages that would otherwise be omitted will be given
                anyway.
        throw   Error messages that would otherwise be omitted will be given
                anyway and also throw an exception and set v:errmsg.
        beep    A message will be given when otherwise only a beep would be
                produced.
        The values can be combined, separated by a comma.
        "msg" and "throw" are useful for debugging 'foldexpr', 'formatexpr' or
        'indentexpr'.

                                                'define' 'def'
'define' 'def'          string  (default "^\s*#\s*define")
                        global or local to buffer global-local
        Pattern to be used to find a macro definition.  It is a search
        pattern, just like for the "/" command.  This option is used for the
        commands like "[i" and "[d" include-search.  The 'isident' option is
        used to recognize the defined name after the match:
                {match with 'define'}{non-ID chars}{defined name}{non-ID char}
        See option-backslash about inserting backslashes to include a space
        or backslash.
        The default value is for C programs.  For C++ this value would be
        useful, to include const type declarations: 
                ^\(#\s*define\|[a-z]*\s*const\s*[a-z]*\)
       You can also use "\ze" just before the name and continue the pattern
        to check what is following.  E.g. for Javascript, if a function is
        defined with "func_name = function(args)": 
                ^\s*\ze\i\+\s*=\s*function(
       If the function is defined with "func_name : function() {...": 
                ^\s*\ze\i\+\s*[:]\s*(*function\s*(
       When using the ":set" command, you need to double the backslashes!
        To avoid that use :let with a single quote string: 
                let &l:define = '^\s*\ze\k\+\s*=\s*function('


                        'delcombine' 'deco' 'nodelcombine' 'nodeco'
'delcombine' 'deco'     boolean (default off)
                        global
        If editing Unicode and this option is set, backspace and Normal mode
        "x" delete each combining character on its own.  When it is off (the
        default) the character along with its combining characters are
        deleted.
        Note: When 'delcombine' is set "xx" may work differently from "2x"!

        This is useful for Arabic, Hebrew and many other languages where one
        may have combining characters overtop of base characters, and want
        to remove only the combining ones.

                                                'dictionary' 'dict'
'dictionary' 'dict'     string  (default "")
                        global or local to buffer global-local
        List of file names, separated by commas, that are used to lookup words
        for keyword completion commands i_CTRL-X_CTRL-K.  Each file should
        contain a list of words.  This can be one word per line, or several
        words per line, separated by non-keyword characters (white space is
        preferred).  Maximum line length is 510 bytes.

        When this option is empty or an entry "spell" is present, and spell
        checking is enabled, words in the word lists for the currently active
        'spelllang' are used. See spell.

        To include a comma in a file name precede it with a backslash.  Spaces
        after a comma are ignored, otherwise spaces are included in the file
        name.  See option-backslash about using backslashes.
        This has nothing to do with the Dictionary variable type.
        Where to find a list of words?
        - BSD/macOS include the "/usr/share/dict/words" file.
        - Try "apt install spell" to get the "/usr/share/dict/words" file on
          apt-managed systems (Debian/Ubuntu).
        The use of :set+= and :set-= is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.
        Backticks cannot be used in this option for security reasons.

                                                        'diff' 'nodiff'
'diff'                  boolean (default off)
                        local to window
        Join the current window in the group of windows that shows differences
        between files.  See diff-mode.

                                                'dex' 'diffexpr'
'diffexpr' 'dex'        string  (default "")
                        global
        Expression which is evaluated to obtain a diff file (either ed-style
        or unified-style) from two versions of a file.  See diff-diffexpr.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'dip' 'diffopt'
'diffopt' 'dip'         string  (default "internal,filler,closeoff")
                        global
        Option settings for diff mode.  It can consist of the following items.
        All are optional.  Items must be separated by a comma.

                filler          Show filler lines, to keep the text
                                synchronized with a window that has inserted
                                lines at the same position.  Mostly useful
                                when windows are side-by-side and 'scrollbind'
                                is set.

                context:{n}     Use a context of {n} lines between a change
                                and a fold that contains unchanged lines.
                                When omitted a context of six lines is used.
                                When using zero the context is actually one,
                                since folds require a line in between, also
                                for a deleted line.
                                See fold-diff.

                iblank          Ignore changes where lines are all blank.  Adds
                                the "-B" flag to the "diff" command if
                                'diffexpr' is empty.  Check the documentation
                                of the "diff" command for what this does
                                exactly.
                                NOTE: the diff windows will get out of sync,
                                because no differences between blank lines are
                                taken into account.

                icase           Ignore changes in case of text.  "a" and "A"
                                are considered the same.  Adds the "-i" flag
                                to the "diff" command if 'diffexpr' is empty.

                iwhite          Ignore changes in amount of white space.  Adds
                                the "-b" flag to the "diff" command if
                                'diffexpr' is empty.  Check the documentation
                                of the "diff" command for what this does
                                exactly.  It should ignore adding trailing
                                white space, but not leading white space.

                iwhiteall       Ignore all white space changes.  Adds
                                the "-w" flag to the "diff" command if
                                'diffexpr' is empty.  Check the documentation
                                of the "diff" command for what this does
                                exactly.

                iwhiteeol       Ignore white space changes at end of line.
                                Adds the "-Z" flag to the "diff" command if
                                'diffexpr' is empty.  Check the documentation
                                of the "diff" command for what this does
                                exactly.

                horizontal      Start diff mode with horizontal splits (unless
                                explicitly specified otherwise).

                vertical        Start diff mode with vertical splits (unless
                                explicitly specified otherwise).

                closeoff        When a window is closed where 'diff' is set
                                and there is only one window remaining in the
                                same tab page with 'diff' set, execute
                                :diffoff in that window.  This undoes a
                                :diffsplit command.

                hiddenoff       Do not use diff mode for a buffer when it
                                becomes hidden.

                foldcolumn:{n}  Set the 'foldcolumn' option to {n} when
                                starting diff mode.  Without this 2 is used.

                followwrap      Follow the 'wrap' option and leave as it is.

                internal        Use the internal diff library.  This is
                                ignored when 'diffexpr' is set.  E960
                                When running out of memory when writing a
                                buffer this item will be ignored for diffs
                                involving that buffer.  Set the 'verbose'
                                option to see when this happens.

                indent-heuristic
                                Use the indent heuristic for the internal
                                diff library.

                algorithm:{text} Use the specified diff algorithm with the
                                internal diff engine. Currently supported
                                algorithms are:
                                myers      the default algorithm
                                minimal    spend extra time to generate the
                                           smallest possible diff
                                patience   patience diff algorithm
                                histogram  histogram diff algorithm

        Examples: 
                :set diffopt=internal,filler,context:4
                :set diffopt=
                :set diffopt=internal,filler,foldcolumn:3
                :set diffopt-=internal  " do NOT use the internal diff parser

                                     'digraph' 'dg' 'nodigraph' 'nodg'
'digraph' 'dg'          boolean (default off)
                        global
        Enable the entering of digraphs in Insert mode with {char1} <BS>
        {char2}.  See digraphs.

                                                'directory' 'dir'
'directory' 'dir'       string  (default "$XDG_STATE_HOME/nvim/swap//")
                        global
        List of directory names for the swap file, separated with commas.

        Possible items:
        - The swap file will be created in the first directory where this is
          possible.  If it is not possible in any directory, but last 
          directory listed in the option does not exist, it is created.
        - Empty means that no swap file will be used (recovery is
          impossible!) and no E303 error will be given.
        - A directory "." means to put the swap file in the same directory as
          the edited file.  On Unix, a dot is prepended to the file name, so
          it doesn't show in a directory listing.  On MS-Windows the "hidden"
          attribute is set and a dot prepended if possible.
        - A directory starting with "./" (or ".\" for MS-Windows) means to put
          the swap file relative to where the edited file is.  The leading "."
          is replaced with the path name of the edited file.
        - For Unix and Win32, if a directory ends in two path separators "//",
          the swap file name will be built from the complete path to the file
          with all path separators replaced by percent '%' signs (including
          the colon following the drive letter on Win32). This will ensure
          file name uniqueness in the preserve directory.
          On Win32, it is also possible to end with "\\".  However, When a
          separating comma is following, you must use "//", since "\\" will
          include the comma in the file name. Therefore it is recommended to
          use '//', instead of '\\'.
        - Spaces after the comma are ignored, other spaces are considered part
          of the directory name.  To have a space at the start of a directory
          name, precede it with a backslash.
        - To include a comma in a directory name precede it with a backslash.
        - A directory name may end in an ':' or '/'.
        - Environment variables are expanded :set_env.
        - Careful with '\' characters, type one before a space, type two to
          get one in the option (see option-backslash), for example: 
            :set dir=c:\\tmp,\ dir\\,with\\,commas,\\\ dir\ with\ spaces
       - For backwards compatibility with Vim version 3.0 a '>' at the start
          of the option is removed.
        Using "." first in the list is recommended.  This means that editing
        the same file twice will result in a warning.  Using "/tmp" on Unix is
        discouraged: When the system crashes you lose the swap file.
        "/var/tmp" is often not cleared when rebooting, thus is a better
        choice than "/tmp".  But others on the computer may be able to see the
        files, and it can contain a lot of files, your swap files get lost in
        the crowd.  That is why a "tmp" directory in your home directory is
        tried first.
        The use of :set+= and :set-= is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                        'display' 'dy'
'display' 'dy'          string  (default "lastline,msgsep")
                        global
        Change the way text is displayed.  This is comma-separated list of
        flags:
        lastline        When included, as much as possible of the last line
                        in a window will be displayed.  "@@@" is put in the
                        last columns of the last screen line to indicate the
                        rest of the line is not displayed.
        truncate        Like "lastline", but "@@@" is displayed in the first
                        column of the last screen line.  Overrules "lastline".
        uhex            Show unprintable characters hexadecimal as <xx>
                        instead of using ^C and ~C.
        msgsep          When showing messages longer than 'cmdheight', only
                        scroll the message lines, not the entire screen. The
                        separator line is decorated by hl-MsgSeparator and
                        the "msgsep" flag of 'fillchars'.

        When neither "lastline" nor "truncate" is included, a last line that
        doesn't fit is replaced with "@" lines.

                                                'eadirection' 'ead'
'eadirection' 'ead'     string  (default "both")
                        global
        Tells when the 'equalalways' option applies:
                ver     vertically, width of windows is not affected
                hor     horizontally, height of windows is not affected
                both    width and height of windows is affected

                                        'emoji' 'emo' 'noemoji' 'noemo'
'emoji' 'emo'   boolean (default: on)
                        global
        When on all Unicode emoji characters are considered to be full width.
        This excludes "text emoji" characters, which are normally displayed as
        single width.  Unfortunately there is no good specification for this
        and it has been determined on trial-and-error basis.  Use the
        setcellwidths() function to change the behavior.

                                        'encoding' 'enc' E543
'encoding' 'enc'
        String-encoding used internally and for RPC communication.
        Always UTF-8.

        See 'fileencoding' to control file-content encoding.

                        'endofline' 'eol' 'noendofline' 'noeol'
'endofline' 'eol'       boolean (default on)
                        local to buffer
        When writing a file and this option is off and the 'binary' option
        is on, or 'fixeol' option is off, no <EOL> will be written for the
        last line in the file.  This option is automatically set or reset when
        starting to edit a new file, depending on whether file has an <EOL>
        for the last line in the file.  Normally you don't have to set or
        reset this option.
        When 'binary' is off and 'fixeol' is on the value is not used when
        writing the file.  When 'binary' is on or 'fixeol' is off it is used
        to remember the presence of a <EOL> for the last line in the file, so
        that when you write the file the situation from the original file can
        be kept.  But you can change it if you want to.

                             'equalalways' 'ea' 'noequalalways' 'noea'
'equalalways' 'ea'      boolean (default on)
                        global
        When on, all the windows are automatically made the same size after
        splitting or closing a window.  This also happens the moment the
        option is switched on.  When off, splitting a window will reduce the
        size of the current window and leave the other windows the same.  When
        closing a window the extra lines are given to the window next to it
        (depending on 'splitbelow' and 'splitright').
        When mixing vertically and horizontally split windows, a minimal size
        is computed and some windows may be larger if there is room.  The
        'eadirection' option tells in which direction the size is affected.
        Changing the height and width of a window can be avoided by setting
        'winfixheight' and 'winfixwidth', respectively.
        If a window size is specified when creating a new window sizes are
        currently not equalized (it's complicated, but may be implemented in
        the future).

                                                'equalprg' 'ep'
'equalprg' 'ep'         string  (default "")
                        global or local to buffer global-local
        External program to use for "=" command.  When this option is empty
        the internal formatting functions are used; either 'lisp', 'cindent'
        or 'indentexpr'.
        Environment variables are expanded :set_env.  See option-backslash
        about including spaces and backslashes.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                        'errorbells' 'eb' 'noerrorbells' 'noeb'
'errorbells' 'eb'       boolean (default off)
                        global
        Ring the bell (beep or screen flash) for error messages.  This only
        makes a difference for error messages, the bell will be used always
        for a lot of errors without a message (e.g., hitting <Esc> in Normal
        mode).  See 'visualbell' to make the bell behave like a screen flash
        or do nothing. See 'belloff' to finetune when to ring the bell.

                                                'errorfile' 'ef'
'errorfile' 'ef'        string  (default: "errors.err")
                        global
        Name of the errorfile for the QuickFix mode (see :cf).
        When the "-q" command-line argument is used, 'errorfile' is set to the
        following argument.  See -q.
        NOT used for the ":make" command.  See 'makeef' for that.
        Environment variables are expanded :set_env.
        See option-backslash about including spaces and backslashes.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'errorformat' 'efm'
'errorformat' 'efm'     string  (default is very long)
                        global or local to buffer global-local
        Scanf-like description of the format for the lines in the error file
        (see errorformat).

                                                'eventignore' 'ei'
'eventignore' 'ei'      string  (default "")
                        global
        A list of autocommand event names, which are to be ignored.
        When set to "all" or when "all" is one of the items, all autocommand
        events are ignored, autocommands will not be executed.
        Otherwise this is a comma-separated list of event names.  Example: 
            :set ei=WinEnter,WinLeave

                                 'expandtab' 'et' 'noexpandtab' 'noet'
'expandtab' 'et'        boolean (default off)
                        local to buffer
        In Insert mode: Use the appropriate number of spaces to insert a
        <Tab>.  Spaces are used in indents with the '>' and '<' commands and
        when 'autoindent' is on.  To insert a real tab when 'expandtab' is
        on, use CTRL-V<Tab>.  See also :retab and ins-expandtab.
        This option is reset when the 'paste' option is set and restored when
        the 'paste' option is reset.

                                'fileencoding' 'fenc' E213
'fileencoding' 'fenc'   string (default: "")
                        local to buffer
        File-content encoding for the current buffer. Conversion is done with
        iconv() or as specified with 'charconvert'.

        When 'fileencoding' is not UTF-8, conversion will be done when
        writing the file.  For reading see below.
        When 'fileencoding' is empty, the file will be saved with UTF-8
        encoding (no conversion when reading or writing a file).

        WARNING: Conversion to a non-Unicode encoding can cause loss of
        information!

        See encoding-names for the possible values.  Additionally, values may be
        specified that can be handled by the converter, see
        mbyte-conversion.

        When reading a file 'fileencoding' will be set from 'fileencodings'.
        To read a file in a certain encoding it won't work by setting
        'fileencoding', use the ++enc argument.  One exception: when
        'fileencodings' is empty the value of 'fileencoding' is used.
        For a new file the global value of 'fileencoding' is used.

        Prepending "8bit-" and "2byte-" has no meaning here, they are ignored.
        When the option is set, the value is converted to lowercase.  Thus
        you can set it with uppercase values too.  '_' characters are
        replaced with '-'.  If a name is recognized from the list at
        encoding-names, it is replaced by the standard name.  For example
        "ISO8859-2" becomes "iso-8859-2".

        When this option is set, after starting to edit a file, the 'modified'
        option is set, because the file would be different when written.

        Keep in mind that changing 'fenc' from a modeline happens
        AFTER the text has been read, thus it applies to when the file will be
        written.  If you do set 'fenc' in a modeline, you might want to set
        'nomodified' to avoid not being able to ":q".

        This option cannot be changed when 'modifiable' is off.

                                        'fileencodings' 'fencs'
'fileencodings' 'fencs' string (default: "ucs-bom,utf-8,default,latin1")
                        global
        This is a list of character encodings considered when starting to edit
        an existing file.  When a file is read, Vim tries to use the first
        mentioned character encoding.  If an error is detected, the next one
        in the list is tried.  When an encoding is found that works,
        'fileencoding' is set to it.  If all fail, 'fileencoding' is set to
        an empty string, which means that UTF-8 is used.
                WARNING: Conversion can cause loss of information! You can use
                the ++bad argument to specify what is done with characters
                that can't be converted.
        For an empty file or a file with only ASCII characters most encodings
        will work and the first entry of 'fileencodings' will be used (except
        "ucs-bom", which requires the BOM to be present).  If you prefer
        another encoding use an BufReadPost autocommand event to test if your
        preferred encoding is to be used.  Example: 
                au BufReadPost * if search('\S', 'w') == 0 |
                        \ set fenc=iso-2022-jp | endif
       This sets 'fileencoding' to "iso-2022-jp" if the file does not contain
        non-blank characters.
        When the ++enc argument is used then the value of 'fileencodings' is
        not used.
        Note that 'fileencodings' is not used for a new file, the global value
        of 'fileencoding' is used instead.  You can set it with: 
                :setglobal fenc=iso-8859-2
       This means that a non-existing file may get a different encoding than
        an empty file.
        The special value "ucs-bom" can be used to check for a Unicode BOM
        (Byte Order Mark) at the start of the file.  It must not be preceded
        by "utf-8" or another Unicode encoding for this to work properly.
        An entry for an 8-bit encoding (e.g., "latin1") should be the last,
        because Vim cannot detect an error, thus the encoding is always
        accepted.
        The special value "default" can be used for the encoding from the
        environment.  It is useful when your environment uses a non-latin1
        encoding, such as Russian.
        When a file contains an illegal UTF-8 byte sequence it won't be
        recognized as "utf-8".  You can use the 8g8 command to find the
        illegal byte sequence.
        WRONG VALUES:                   WHAT'S WRONG:
                latin1,utf-8            "latin1" will always be used
                utf-8,ucs-bom,latin1    BOM won't be recognized in an utf-8
                                        file
                cp1250,latin1           "cp1250" will always be used
        If 'fileencodings' is empty, 'fileencoding' is not modified.
        See 'fileencoding' for the possible values.
        Setting this option does not have an effect until the next time a file
        is read.

                                        'fileformat' 'ff'
'fileformat' 'ff'       string (Windows default: "dos",
                                Unix default: "unix")
                        local to buffer
        This gives the <EOL> of the current buffer, which is used for
        reading/writing the buffer from/to a file:
            dos     <CR><NL>
            unix    <NL>
            mac     <CR>
        When "dos" is used, CTRL-Z at the end of a file is ignored.
        See file-formats and file-read.
        For the character encoding of the file see 'fileencoding'.
        When 'binary' is set, the value of 'fileformat' is ignored, file I/O
        works like it was set to "unix".
        This option is set automatically when starting to edit a file and
        'fileformats' is not empty and 'binary' is off.
        When this option is set, after starting to edit a file, the 'modified'
        option is set, because the file would be different when written.
        This option cannot be changed when 'modifiable' is off.

                                        'fileformats' 'ffs'
'fileformats' 'ffs'     string (default:
                                Win32: "dos,unix",
                                Unix: "unix,dos")
                        global
        This gives the end-of-line (<EOL>) formats that will be tried when
        starting to edit a new buffer and when reading a file into an existing
        buffer:
        - When empty, the format defined with 'fileformat' will be used
          always.  It is not set automatically.
        - When set to one name, that format will be used whenever a new buffer
          is opened.  'fileformat' is set accordingly for that buffer.  The
          'fileformats' name will be used when a file is read into an existing
          buffer, no matter what 'fileformat' for that buffer is set to.
        - When more than one name is present, separated by commas, automatic
          <EOL> detection will be done when reading a file.  When starting to
          edit a file, a check is done for the <EOL>:
          1. If all lines end in <CR><NL>, and 'fileformats' includes "dos",
             'fileformat' is set to "dos".
          2. If a <NL> is found and 'fileformats' includes "unix", 'fileformat'
             is set to "unix".  Note that when a <NL> is found without a
             preceding <CR>, "unix" is preferred over "dos".
          3. If 'fileformat' has not yet been set, and if a <CR> is found, and
             if 'fileformats' includes "mac", 'fileformat' is set to "mac".
             This means that "mac" is only chosen when:
              "unix" is not present or no <NL> is found in the file, and
              "dos" is not present or no <CR><NL> is found in the file.
             Except: if "unix" was chosen, but there is a <CR> before
             the first <NL>, and there appear to be more <CR>s than <NL>s in
             the first few lines, "mac" is used.
          4. If 'fileformat' is still not set, the first name from
             'fileformats' is used.
          When reading a file into an existing buffer, the same is done, but
          this happens like 'fileformat' has been set appropriately for that
          file only, the option is not changed.
        When 'binary' is set, the value of 'fileformats' is not used.

        When Vim starts up with an empty buffer the first item is used.  You
        can overrule this by setting 'fileformat' in your .vimrc.

        For systems with a Dos-like <EOL> (<CR><NL>), when reading files that
        are ":source"ed and for vimrc files, automatic <EOL> detection may be
        done:
        - When 'fileformats' is empty, there is no automatic detection.  Dos
          format will be used.
        - When 'fileformats' is set to one or more names, automatic detection
          is done.  This is based on the first <NL> in the file: If there is a
          <CR> in front of it, Dos format is used, otherwise Unix format is
          used.
        Also see file-formats.

                'fileignorecase' 'fic' 'nofileignorecase' 'nofic'
'fileignorecase' 'fic'  boolean (default on for systems where case in file
                                 names is normally ignored)
                        global
        When set case is ignored when using file names and directories.
        See 'wildignorecase' for only ignoring case when doing completion.

                                        'filetype' 'ft'
'filetype' 'ft'         string (default: "")
                        local to buffer
        When this option is set, the FileType autocommand event is triggered.
        All autocommands that match with the value of this option will be
        executed.  Thus the value of 'filetype' is used in place of the file
        name.
        Otherwise this option does not always reflect the current file type.
        This option is normally set when the file type is detected.  To enable
        this use the ":filetype on" command. :filetype
        Setting this option to a different value is most useful in a modeline,
        for a file for which the file type is not automatically recognized.
        Example, for in an IDL file:
                /* vim: set filetype=idl : */ 
        FileType filetypes
        When a dot appears in the value then this separates two filetype
        names.  Example:
                /* vim: set filetype=c.doxygen : */ 
        This will use the "c" filetype first, then the "doxygen" filetype.
        This works both for filetype plugins and for syntax files.  More than
        one dot may appear.
        This option is not copied to another buffer, independent of the 's' or
        'S' flag in 'cpoptions'.
        Only normal file name characters can be used, "/\*?[|<>" are illegal.

                                                'fillchars' 'fcs'
'fillchars' 'fcs'       string  (default "")
                        global or local to window global-local
        Characters to fill the statuslines, vertical separators and special
        lines in the window.
        It is a comma-separated list of items.  Each item has a name, a colon
        and the value of that item:

          item          default         Used for 
          stl           ' ' or '^'      statusline of the current window
          stlnc         ' ' or '='      statusline of the non-current windows
          wbr           ' '             window bar
          horiz         '' or '-'      horizontal separators :split
          horizup       '' or '-'      upwards facing horizontal separator
          horizdown     '' or '-'      downwards facing horizontal separator
          vert          '' or '|'      vertical separators :vsplit
          vertleft      '' or '|'      left facing vertical separator
          vertright     '' or '|'      right facing vertical separator
          verthoriz     '' or '+'      overlapping vertical and horizontal
                                        separator
          fold          '·' or '-'      filling 'foldtext'
          foldopen      '-'             mark the beginning of a fold
          foldclose     '+'             show a closed fold
          foldsep       '' or '|'      open fold middle marker
          diff          '-'             deleted lines of the 'diff' option
          msgsep        ' '             message separator 'display'
          eob           '~'             empty lines at the end of a buffer

        Any one that is omitted will fall back to the default.  For "stl" and
        "stlnc" the space will be used when there is highlighting, '^' or '='
        otherwise.

        Note that "horiz", "horizup", "horizdown", "vertleft", "vertright" and
        "verthoriz" are only used when 'laststatus' is 3, since only vertical
        window separators are used otherwise.

        If 'ambiwidth' is "double" then "horiz", "horizup", "horizdown",
        "vert", "vertleft", "vertright", "verthoriz", "foldsep" and "fold"
        default to single-byte alternatives.

        Example: 
            :set fillchars=stl:^,stlnc:=,vert:│,fold:·,diff:-
       This is similar to the default, except that these characters will also
        be used when there is highlighting.

        For the "stl", "stlnc", "foldopen", "foldclose" and "foldsep" items
        single-byte and multibyte characters are supported.  But double-width
        characters are not supported.

        The highlighting used for these items:
          item          highlight group 
          stl           StatusLine              hl-StatusLine
          stlnc         StatusLineNC            hl-StatusLineNC
          wbr           WinBar                  hl-WinBar or hl-WinBarNC
          horiz         WinSeparator            hl-WinSeparator
          horizup       WinSeparator            hl-WinSeparator
          horizdown     WinSeparator            hl-WinSeparator
          vert          WinSeparator            hl-WinSeparator
          vertleft      WinSeparator            hl-WinSeparator
          vertright     WinSeparator            hl-WinSeparator
          verthoriz     WinSeparator            hl-WinSeparator
          fold          Folded                  hl-Folded
          diff          DiffDelete              hl-DiffDelete
          eob           EndOfBuffer             hl-EndOfBuffer

                'fixendofline' 'fixeol' 'nofixendofline' 'nofixeol'
'fixendofline' 'fixeol' boolean (default on)
                        local to buffer
        When writing a file and this option is on, <EOL> at the end of file
        will be restored if missing. Turn this option off if you want to
        preserve the situation from the original file.
        When the 'binary' option is set the value of this option doesn't
        matter.
        See the 'endofline' option.

                                                'foldclose' 'fcl'
'foldclose' 'fcl'       string (default "")
                        global
        When set to "all", a fold is closed when the cursor isn't in it and
        its level is higher than 'foldlevel'.  Useful if you want folds to
        automatically close when moving out of them.

                                                'foldcolumn' 'fdc'
'foldcolumn' 'fdc'      string (default "0")
                        local to window
        When and how to draw the foldcolumn. Valid values are:
            "auto":       resize to the minimum amount of folds to display.
            "auto:[1-9]": resize to accommodate multiple folds up to the
                          selected level
            0:            to disable foldcolumn
            "[1-9]":      to display a fixed number of columns
        See folding.

                        'foldenable' 'fen' 'nofoldenable' 'nofen'
'foldenable' 'fen'      boolean (default on)
                        local to window
        When off, all folds are open.  This option can be used to quickly
        switch between showing all text unfolded and viewing the text with
        folds (including manually opened or closed folds).  It can be toggled
        with the zi command.  The 'foldcolumn' will remain blank when
        'foldenable' is off.
        This option is set by commands that create a new fold or close a fold.
        See folding.

                                                'foldexpr' 'fde'
'foldexpr' 'fde'        string (default: "0")
                        local to window
        The expression used for when 'foldmethod' is "expr".  It is evaluated
        for each line to obtain its fold level.  See fold-expr.

        The expression will be evaluated in the sandbox if set from a
        modeline, see sandbox-option.
        This option can't be set from a modeline when the 'diff' option is
        on or the 'modelineexpr' option is off.

        It is not allowed to change text or jump to another window while
        evaluating 'foldexpr' textlock.

                                                'foldignore' 'fdi'
'foldignore' 'fdi'      string (default: "#")
                        local to window
        Used only when 'foldmethod' is "indent".  Lines starting with
        characters in 'foldignore' will get their fold level from surrounding
        lines.  White space is skipped before checking for this character.
        The default "#" works well for C programs.  See fold-indent.

                                                'foldlevel' 'fdl'
'foldlevel' 'fdl'       number (default: 0)
                        local to window
        Sets the fold level: Folds with a higher level will be closed.
        Setting this option to zero will close all folds.  Higher numbers will
        close fewer folds.
        This option is set by commands like zm, zM and zR.
        See fold-foldlevel.

                                                'foldlevelstart' 'fdls'
'foldlevelstart' 'fdls' number (default: -1)
                        global
        Sets 'foldlevel' when starting to edit another buffer in a window.
        Useful to always start editing with all folds closed (value zero),
        some folds closed (one) or no folds closed (99).
        This is done before reading any modeline, thus a setting in a modeline
        overrules this option.  Starting to edit a file for diff-mode also
        ignores this option and closes all folds.
        It is also done before BufReadPre autocommands, to allow an autocmd to
        overrule the 'foldlevel' value for specific files.
        When the value is negative, it is not used.

                                                'foldmarker' 'fmr' E536
'foldmarker' 'fmr'      string (default: "{{{,}}}")
                        local to window
        The start and end marker used when 'foldmethod' is "marker".  There
        must be one comma, which separates the start and end marker.  The
        marker is a literal string (a regular expression would be too slow).
        See fold-marker.

                                                'foldmethod' 'fdm'
'foldmethod' 'fdm'      string (default: "manual")
                        local to window
        The kind of folding used for the current window.  Possible values:
        fold-manual   manual      Folds are created manually.
        fold-indent   indent      Lines with equal indent form a fold.
        fold-expr     expr        'foldexpr' gives the fold level of a line.
        fold-marker   marker      Markers are used to specify folds.
        fold-syntax   syntax      Syntax highlighting items specify folds.
        fold-diff     diff        Fold text that is not changed.

                                                'foldminlines' 'fml'
'foldminlines' 'fml'    number (default: 1)
                        local to window
        Sets the number of screen lines above which a fold can be displayed
        closed.  Also for manually closed folds.  With the default value of
        one a fold can only be closed if it takes up two or more screen lines.
        Set to zero to be able to close folds of just one screen line.
        Note that this only has an effect on what is displayed.  After using
        "zc" to close a fold, which is displayed open because it's smaller
        than 'foldminlines', a following "zc" may close a containing fold.

                                                'foldnestmax' 'fdn'
'foldnestmax' 'fdn'     number (default: 20)
                        local to window
        Sets the maximum nesting of folds for the "indent" and "syntax"
        methods.  This avoids that too many folds will be created.  Using more
        than 20 doesn't work, because the internal limit is 20.

                                                'foldopen' 'fdo'
'foldopen' 'fdo'        string (default: "block,hor,mark,percent,quickfix,
                                                             search,tag,undo")
                        global
        Specifies for which type of commands folds will be opened, if the
        command moves the cursor into a closed fold.  It is a comma-separated
        list of items.
        NOTE: When the command is part of a mapping this option is not used.
        Add the zv command to the mapping to get the same effect.
        (rationale: the mapping may want to control opening folds itself)

                item            commands 
                all             any
                block           "(", "{", "[[", "[{", etc.
                hor             horizontal movements: "l", "w", "fx", etc.
                insert          any command in Insert mode
                jump            far jumps: "G", "gg", etc.
                mark            jumping to a mark: "'m", CTRL-O, etc.
                percent         "%"
                quickfix        ":cn", ":crew", ":make", etc.
                search          search for a pattern: "/", "n", "*", "gd", etc.
                                (not for a search pattern in a ":" command)
                                Also for [s and ]s.
                tag             jumping to a tag: ":ta", CTRL-T, etc.
                undo            undo or redo: "u" and CTRL-R
        When a movement command is used for an operator (e.g., "dl" or "y%")
        this option is not used.  This means the operator will include the
        whole closed fold.
        Note that vertical movements are not here, because it would make it
        very difficult to move onto a closed fold.
        In insert mode the folds containing the cursor will always be open
        when text is inserted.
        To close folds you can re-apply 'foldlevel' with the zx command or
        set the 'foldclose' option to "all".

                                                'foldtext' 'fdt'
'foldtext' 'fdt'        string (default: "foldtext()")
                        local to window
        An expression which is used to specify the text displayed for a closed
        fold.  See fold-foldtext.

        The expression will be evaluated in the sandbox if set from a
        modeline, see sandbox-option.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        It is not allowed to change text or jump to another window while
        evaluating 'foldtext' textlock.

                                                'formatexpr' 'fex'
'formatexpr' 'fex'      string (default "")
                        local to buffer
        Expression which is evaluated to format a range of lines for the gq
        operator or automatic formatting (see 'formatoptions').  When this
        option is empty 'formatprg' is used.

        The v:lnum  variable holds the first line to be formatted.
        The v:count variable holds the number of lines to be formatted.
        The v:char  variable holds the character that is going to be
                      inserted if the expression is being evaluated due to
                      automatic formatting.  This can be empty.  Don't insert
                      it yet!

        Example: 
                :set formatexpr=mylang#Format()
       This will invoke the mylang#Format() function in the
        autoload/mylang.vim file in 'runtimepath'. autoload

        The expression is also evaluated when 'textwidth' is set and adding
        text beyond that limit.  This happens under the same conditions as
        when internal formatting is used.  Make sure the cursor is kept in the
        same spot relative to the text then!  The mode() function will
        return "i" or "R" in this situation.

        When the expression evaluates to non-zero Vim will fall back to using
        the internal format mechanism.

        The expression will be evaluated in the sandbox when set from a
        modeline, see sandbox-option.  That stops the option from working,
        since changing the buffer text is not allowed.
        This option cannot be set in a modeline when 'modelineexpr' is off.
        NOTE: This option is set to "" when 'compatible' is set.

                                        'formatlistpat' 'flp'
'formatlistpat' 'flp'   string (default: "^\s*\d\+[\]:.)}\t ]\s*")
                        local to buffer
        A pattern that is used to recognize a list header.  This is used for
        the "n" flag in 'formatoptions'.
        The pattern must match exactly the text that will be the indent for
        the line below it.  You can use /\ze to mark the end of the match
        while still checking more characters.  There must be a character
        following the pattern, when it matches the whole line it is handled
        like there is no match.
        The default recognizes a number, followed by an optional punctuation
        character and white space.

                                        'formatoptions' 'fo'
'formatoptions' 'fo'    string (default: "tcqj")
                        local to buffer
        This is a sequence of letters which describes how automatic
        formatting is to be done.  See fo-table.  When the 'paste' option is
        on, no formatting is done (like 'formatoptions' is empty).  Commas can
        be inserted for readability.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" add-option-flags.

                                                'formatprg' 'fp'
'formatprg' 'fp'        string (default "")
                        global or local to buffer global-local
        The name of an external program that will be used to format the lines
        selected with the gq operator.  The program must take the input on
        stdin and produce the output on stdout.  The Unix program "fmt" is
        such a program.
        If the 'formatexpr' option is not empty it will be used instead.
        Otherwise, if 'formatprg' option is an empty string, the internal
        format function will be used C-indenting.
        Environment variables are expanded :set_env.  See option-backslash
        about including spaces and backslashes.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                        'fsync' 'fs' 'nofsync' 'nofs'
'fsync' 'fs'            boolean (default off)
                        global
        When on, the OS function fsync() will be called after saving a file
        (:write, writefile(), …), swap-file and shada-file. This
        flushes the file to disk, ensuring that it is safely written.
        Slow on some systems: writing buffers, quitting Nvim, and other
        operations may sometimes take a few seconds.

        Files are ALWAYS flushed ('fsync' is ignored) when:
        - CursorHold event is triggered
        - :preserve is called
        - system signals low battery life
        - Nvim exits abnormally

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                   'gdefault' 'gd' 'nogdefault' 'nogd'
'gdefault' 'gd'         boolean (default off)
                        global
        When on, the ":substitute" flag 'g' is default on.  This means that
        all matches in a line are substituted instead of one.  When a 'g' flag
        is given to a ":substitute" command, this will toggle the substitution
        of all or one match.  See complex-change.

                command         'gdefault' on   'gdefault' off  
                :s///             subst. all      subst. one
                :s///g            subst. one      subst. all
                :s///gg           subst. all      subst. one

        DEPRECATED: Setting this option may break plugins that are not aware
        of this option.  Also, many users get confused that adding the /g flag
        has the opposite effect of that it normally does.

                                                'grepformat' 'gfm'
'grepformat' 'gfm'      string  (default "%f:%l:%m,%f:%l%m,%f  %l%m")
                        global
        Format to recognize for the ":grep" command output.
        This is a scanf-like string that uses the same format as the
        'errorformat' option: see errorformat.

                                                'grepprg' 'gp'
'grepprg' 'gp'          string  (default "grep -n ",
                                 Unix: "grep -n $* /dev/null")
                        global or local to buffer global-local
        Program to use for the :grep command.  This option may contain '%'
        and '#' characters, which are expanded like when used in a command-
        line.  The placeholder "$*" is allowed to specify where the arguments
        will be included.  Environment variables are expanded :set_env.  See
        option-backslash about including spaces and backslashes.
        When your "grep" accepts the "-H" argument, use this to make ":grep"
        also work well with a single file: 
                :set grepprg=grep\ -nH
       Special value: When 'grepprg' is set to "internal" the :grep command
        works like :vimgrep, :lgrep like :lvimgrep, :grepadd like
        :vimgrepadd and :lgrepadd like :lvimgrepadd.
        See also the section :make_makeprg, since most of the comments there
        apply equally to 'grepprg'.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                        'guicursor' 'gcr' E545 E546 E548 E549
'guicursor' 'gcr'       string  (default "n-v-c-sm:block,i-ci-ve:ver25,r-cr-o:hor20")
                        global
        Configures the cursor style for each mode. Works in the GUI and many
        terminals.  See tui-cursor-shape.

        To disable cursor-styling, reset the option: 
                :set guicursor=

       To enable mode shapes, "Cursor" highlight, and blinking: 
                :set guicursor=n-v-c:block,i-ci-ve:ver25,r-cr:hor20,o:hor50
                  \,a:blinkwait700-blinkoff400-blinkon250-Cursor/lCursor
                  \,sm:block-blinkwait175-blinkoff150-blinkon175

       The option is a comma-separated list of parts.  Each part consists of a
        mode-list and an argument-list:
                mode-list:argument-list,mode-list:argument-list,..
        The mode-list is a dash separated list of these modes:
                n       Normal mode
                v       Visual mode
                ve      Visual mode with 'selection' "exclusive" (same as 'v',
                        if not specified)
                o       Operator-pending mode
                i       Insert mode
                r       Replace mode
                c       Command-line Normal (append) mode
                ci      Command-line Insert mode
                cr      Command-line Replace mode
                sm      showmatch in Insert mode
                a       all modes
        The argument-list is a dash separated list of these arguments:
                hor{N}  horizontal bar, {N} percent of the character height
                ver{N}  vertical bar, {N} percent of the character width
                block   block cursor, fills the whole character
                        - Only one of the above three should be present.
                        - Default is "block" for each mode.
                blinkwait{N}                            cursor-blinking
                blinkon{N}
                blinkoff{N}
                        blink times for cursor: blinkwait is the delay before
                        the cursor starts blinking, blinkon is the time that
                        the cursor is shown and blinkoff is the time that the
                        cursor is not shown.  Times are in msec.  When one of
                        the numbers is zero, there is no blinking. E.g.: 
                                :set guicursor=n:blinkon0
                       - Default is "blinkon0" for each mode.
                {group-name}
                        Highlight group that decides the color and font of the
                        cursor.
                        In the TUI:
                        - inverse/reverse and no group-name are interpreted
                          as "host-terminal default cursor colors" which
                          typically means "inverted bg and fg colors".
                        - ctermfg and guifg are ignored.
                {group-name}/{group-name}
                        Two highlight group names, the first is used when
                        no language mappings are used, the other when they
                        are. language-mapping

        Examples of parts:
           n-c-v:block-nCursor  In Normal, Command-line and Visual mode, use a
                                block cursor with colors from the "nCursor"
                                highlight group
           n-v-c-sm:block,i-ci-ve:ver25-Cursor,r-cr-o:hor20
                                In Normal et al. modes, use a block cursor
                                with the default colors defined by the host
                                terminal.  In Insert-likes modes, use
                                a vertical bar cursor with colors from
                                "Cursor" highlight group.  In Replace-likes
                                modes, use a underline cursor with
                                default colors.
           i-ci:ver30-iCursor-blinkwait300-blinkon200-blinkoff150
                                In Insert and Command-line Insert mode, use a
                                30% vertical bar cursor with colors from the
                                "iCursor" highlight group.  Blink a bit
                                faster.

        The 'a' mode is different.  It will set the given argument-list for
        all modes.  It does not reset anything to defaults.  This can be used
        to do a common setting for all modes.  For example, to switch off
        blinking: "a:blinkon0"

        Examples of cursor highlighting: 
            :highlight Cursor gui=reverse guifg=NONE guibg=NONE
            :highlight Cursor gui=NONE guifg=bg guibg=fg

                                        'guifont' 'gfn'
                                                   E235 E596
'guifont' 'gfn'         string  (default "")
                        global
        This is a list of fonts which will be used for the GUI version of Vim.
        In its simplest form the value is just one font name.  When
        the font cannot be found you will get an error message.  To try other
        font names a list can be specified, font names separated with commas.
        The first valid font is used.

        Spaces after a comma are ignored.  To include a comma in a font name
        precede it with a backslash.  Setting an option requires an extra
        backslash before a space and a backslash.  See also
        option-backslash.  For example: 
            :set guifont=Screen15,\ 7x13,font\\,with\\,commas
       will make Vim try to use the font "Screen15" first, and if it fails it
        will try to use "7x13" and then "font,with,commas" instead.

        If none of the fonts can be loaded, Vim will keep the current setting.
        If an empty font list is given, Vim will try using other resource
        settings (for X, it will use the Vim.font resource), and finally it
        will try some builtin default which should always be there ("7x13" in
        the case of X).  The font names given should be "normal" fonts.  Vim
        will try to find the related bold and italic fonts.

        For Win32 and Mac OS: 
            :set guifont=*
       will bring up a font requester, where you can pick the font you want.

        The font name depends on the GUI used.

        For Mac OSX you can use something like this: 
            :set guifont=Monaco:h10
                                                               E236
        Note that the fonts must be mono-spaced (all characters have the same
        width).

        To preview a font on X11, you might be able to use the "xfontsel"
        program.  The "xlsfonts" program gives a list of all available fonts.

        For the Win32 GUI                                       E244 E245
        - takes these options in the font name:
                hXX - height is XX (points, can be floating-point)
                wXX - width is XX (points, can be floating-point)
                b   - bold
                i   - italic
                u   - underline
                s   - strikeout
                cXX - character set XX.  Valid charsets are: ANSI, ARABIC,
                      BALTIC, CHINESEBIG5, DEFAULT, EASTEUROPE, GB2312, GREEK,
                      HANGEUL, HEBREW, JOHAB, MAC, OEM, RUSSIAN, SHIFTJIS,
                      SYMBOL, THAI, TURKISH, VIETNAMESE ANSI and BALTIC.
                      Normally you would use "cDEFAULT".

          Use a ':' to separate the options.
        - A '_' can be used in the place of a space, so you don't need to use
          backslashes to escape the spaces.
        - Examples: 
            :set guifont=courier_new:h12:w5:b:cRUSSIAN
            :set guifont=Andale_Mono:h7.5:w4.5

                                'guifontwide' 'gfw' E231 E533 E534
'guifontwide' 'gfw'     string  (default "")
                        global
        Comma-separated list of fonts to be used for double-width characters.
        The first font that can be loaded is used.
        Note: The size of these fonts must be exactly twice as wide as the one
        specified with 'guifont' and the same height.

        When 'guifont' has a valid font and 'guifontwide' is empty Vim will
        attempt to set 'guifontwide' to a matching double-width font.

                                                'guioptions' 'go'
'guioptions' 'go'       string  (default "egmrLT"   (MS-Windows))
                        global
        This option only has an effect in the GUI version of Vim.  It is a
        sequence of letters which describes what components and options of the
        GUI should be used.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" add-option-flags.

        Valid letters are as follows:
                                                        guioptions_a 'go-a'
          'a'   Autoselect:  If present, then whenever VISUAL mode is started,
                or the Visual area extended, Vim tries to become the owner of
                the windowing system's global selection.  This means that the
                Visually highlighted text is available for pasting into other
                applications as well as into Vim itself.  When the Visual mode
                ends, possibly due to an operation on the text, or when an
                application wants to paste the selection, the highlighted text
                is automatically yanked into the "* selection register.
                Thus the selection is still available for pasting into other
                applications after the VISUAL mode has ended.
                    If not present, then Vim won't become the owner of the
                windowing system's global selection unless explicitly told to
                by a yank or delete operation for the "* register.
                The same applies to the modeless selection.
                                                                'go-P'
          'P'   Like autoselect but using the "+ register instead of the "*
                register.
                                                                'go-A'
          'A'   Autoselect for the modeless selection.  Like 'a', but only
                applies to the modeless selection.

                    'guioptions'   autoselect Visual  autoselect modeless 
                         ""              -                       -
                         "a"            yes                     yes
                         "A"             -                      yes
                         "aA"           yes                     yes

                                                                'go-c'
          'c'   Use console dialogs instead of popup dialogs for simple
                choices.
                                                                'go-d'
          'd'   Use dark theme variant if available.
                                                                'go-e'
          'e'   Add tab pages when indicated with 'showtabline'.
                'guitablabel' can be used to change the text in the labels.
                When 'e' is missing a non-GUI tab pages line may be used.
                The GUI tabs are only supported on some systems, currently
                Mac OS/X and MS-Windows.
                                                                'go-i'
          'i'   Use a Vim icon.
                                                                'go-m'
          'm'   Menu bar is present.
                                                                'go-M'
          'M'   The system menu "$VIMRUNTIME/menu.vim" is not sourced.  Note
                that this flag must be added in the vimrc file, before
                switching on syntax or filetype recognition (when the gvimrc
                file is sourced the system menu has already been loaded; the
                `:syntax on` and `:filetype on` commands load the menu too).
                                                                'go-g'
          'g'   Grey menu items: Make menu items that are not active grey.  If
                'g' is not included inactive menu items are not shown at all.
                                                                'go-T'
          'T'   Include Toolbar.  Currently only in Win32 GUI.
                                                                'go-r'
          'r'   Right-hand scrollbar is always present.
                                                                'go-R'
          'R'   Right-hand scrollbar is present when there is a vertically
                split window.
                                                                'go-l'
          'l'   Left-hand scrollbar is always present.
                                                                'go-L'
          'L'   Left-hand scrollbar is present when there is a vertically
                split window.
                                                                'go-b'
          'b'   Bottom (horizontal) scrollbar is present.  Its size depends on
                the longest visible line, or on the cursor line if the 'h'
                flag is included. gui-horiz-scroll
                                                                'go-h'
          'h'   Limit horizontal scrollbar size to the length of the cursor
                line.  Reduces computations. gui-horiz-scroll

        And yes, you may even have scrollbars on the left AND the right if
        you really want to :-).  See gui-scrollbars for more information.

                                                                'go-v'
          'v'   Use a vertical button layout for dialogs.  When not included,
                a horizontal layout is preferred, but when it doesn't fit a
                vertical layout is used anyway.  Not supported in GTK 3.
                                                                'go-p'
          'p'   Use Pointer callbacks for X11 GUI.  This is required for some
                window managers.  If the cursor is not blinking or hollow at
                the right moment, try adding this flag.  This must be done
                before starting the GUI.  Set it in your gvimrc.  Adding or
                removing it after the GUI has started has no effect.
                                                                'go-k'
          'k'   Keep the GUI window size when adding/removing a scrollbar, or
                toolbar, tabline, etc.  Instead, the behavior is similar to
                when the window is maximized and will adjust 'lines' and
                'columns' to fit to the window.  Without the 'k' flag Vim will
                try to keep 'lines' and 'columns' the same when adding and
                removing GUI components.

                                                'guitablabel' 'gtl'
'guitablabel' 'gtl'     string  (default empty)
                        global
        When non-empty describes the text to use in a label of the GUI tab
        pages line.  When empty and when the result is empty Vim will use a
        default label.  See setting-guitablabel for more info.

        The format of this option is like that of 'statusline'.
        'guitabtooltip' is used for the tooltip, see below.
        The expression will be evaluated in the sandbox when set from a
        modeline, see sandbox-option.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        Only used when the GUI tab pages line is displayed.  'e' must be
        present in 'guioptions'.  For the non-GUI tab pages line 'tabline' is
        used.

                                                'guitabtooltip' 'gtt'
'guitabtooltip' 'gtt'   string  (default empty)
                        global
        When non-empty describes the text to use in a tooltip for the GUI tab
        pages line.  When empty Vim will use a default tooltip.
        This option is otherwise just like 'guitablabel' above.
        You can include a line break.  Simplest method is to use :let: 
                :let &guitabtooltip = "line one\nline two"


                                                'helpfile' 'hf'
'helpfile' 'hf'         string  (default (MS-Windows) "$VIMRUNTIME\doc\help.txt"
                                         (others) "$VIMRUNTIME/doc/help.txt")
                        global
        Name of the main help file.  All distributed help files should be
        placed together in one directory.  Additionally, all "doc" directories
        in 'runtimepath' will be used.
        Environment variables are expanded :set_env.  For example:
        "$VIMRUNTIME/doc/help.txt".  If $VIMRUNTIME is not set, $VIM is also
        tried.  Also see $VIMRUNTIME and option-backslash about including
        spaces and backslashes.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'helpheight' 'hh'
'helpheight' 'hh'       number  (default 20)
                        global
        Minimal initial height of the help window when it is opened with the
        ":help" command.  The initial height of the help window is half of the
        current window, or (when the 'ea' option is on) the same as other
        windows.  When the height is less than 'helpheight', the height is
        set to 'helpheight'.  Set to zero to disable.

                                                'helplang' 'hlg'
'helplang' 'hlg'        string  (default: messages language or empty)
                        global
        Comma-separated list of languages.  Vim will use the first language
        for which the desired help can be found.  The English help will always
        be used as a last resort.  You can add "en" to prefer English over
        another language, but that will only find tags that exist in that
        language and not in the English help.
        Example: 
                :set helplang=de,it
       This will first search German, then Italian and finally English help
        files.
        When using CTRL-] and ":help!" in a non-English help file Vim will
        try to find the tag in the current language before using this option.
        See help-translated.

                                     'hidden' 'hid' 'nohidden' 'nohid'
'hidden' 'hid'          boolean (default on)
                        global
        When off a buffer is unloaded (including loss of undo information)
        when it is abandoned.  When on a buffer becomes hidden when it is
        abandoned.  A buffer displayed in another window does not become
        hidden, of course.

        Commands that move through the buffer list sometimes hide a buffer
        although the 'hidden' option is off when these three are true:
        - the buffer is modified
        - 'autowrite' is off or writing is not possible
        - the '!' flag was used
        Also see windows.

        To hide a specific buffer use the 'bufhidden' option.
        'hidden' is set for one command with ":hide {command}" :hide.

                                                'history' 'hi'
'history' 'hi'          number  (default: 10000)
                        global
        A history of ":" commands, and a history of previous search patterns
        is remembered.  This option decides how many entries may be stored in
        each of these histories (see cmdline-editing).
        The maximum value is 10000.

                                         'hkmap' 'hk' 'nohkmap' 'nohk'
'hkmap' 'hk'            boolean (default off)
                        global
        When on, the keyboard is mapped for the Hebrew character set.
        Normally you would set 'allowrevins' and use CTRL-_ in insert mode to
        toggle this option.  See rileft.txt.

                                 'hkmapp' 'hkp' 'nohkmapp' 'nohkp'
'hkmapp' 'hkp'          boolean (default off)
                        global
        When on, phonetic keyboard mapping is used.  'hkmap' must also be on.
        This is useful if you have a non-Hebrew keyboard.
        See rileft.txt.

                                 'hlsearch' 'hls' 'nohlsearch' 'nohls'
'hlsearch' 'hls'        boolean (default on)
                        global
        When there is a previous search pattern, highlight all its matches.
        The hl-Search highlight group determines the highlighting for all
        matches not under the cursor while the hl-CurSearch highlight group
        (if defined) determines the highlighting for the match under the
        cursor. If hl-CurSearch is not defined, then hl-Search is used for
        both. Note that only the matching text is highlighted, any offsets
        are not applied.
        See also: 'incsearch' and :match.
        When you get bored looking at the highlighted matches, you can turn it
        off with :nohlsearch.  This does not change the option value, as
        soon as you use a search command, the highlighting comes back.
        'redrawtime' specifies the maximum time spent on finding matches.
        When the search pattern can match an end-of-line, Vim will try to
        highlight all of the matched text.  However, this depends on where the
        search starts.  This will be the first line in the window or the first
        line below a closed fold.  A match in a previous line which is not
        drawn may not continue in a newly drawn line.
        You can specify whether the highlight status is restored on startup
        with the 'h' flag in 'shada' shada-h.

                                                'icon' 'noicon'
'icon'                  boolean (default off, on when title can be restored)
                        global
        When on, the icon text of the window will be set to the value of
        'iconstring' (if it is not empty), or to the name of the file
        currently being edited.  Only the last part of the name is used.
        Overridden by the 'iconstring' option.
        Only works if the terminal supports setting window icons.

                                                'iconstring'
'iconstring'            string  (default "")
                        global
        When this option is not empty, it will be used for the icon text of
        the window.  This happens only when the 'icon' option is on.
        Only works if the terminal supports setting window icon text
        When this option contains printf-style '%' items, they will be
        expanded according to the rules used for 'statusline'.  See
        'titlestring' for example settings.
        This option cannot be set in a modeline when 'modelineexpr' is off.

                        'ignorecase' 'ic' 'noignorecase' 'noic'
'ignorecase' 'ic'       boolean (default off)
                        global
        Ignore case in search patterns.  Also used when searching in the tags
        file.
        Also see 'smartcase' and 'tagcase'.
        Can be overruled by using "\c" or "\C" in the pattern, see
        /ignorecase.

                                'imcmdline' 'imc' 'noimcmdline' 'noimc'
'imcmdline' 'imc'       boolean (default off)
                        global
        When set the Input Method is always on when starting to edit a command
        line, unless entering a search pattern (see 'imsearch' for that).
        Setting this option is useful when your input method allows entering
        English characters directly, e.g., when it's used to type accented
        characters with dead keys.

                                'imdisable' 'imd' 'noimdisable' 'noimd'
'imdisable' 'imd'       boolean (default off, on for some systems (SGI))
                        global
        When set the Input Method is never used.  This is useful to disable
        the IM when it doesn't work properly.
        Currently this option is on by default for SGI/IRIX machines.  This
        may change in later releases.

                                                'iminsert' 'imi'
'iminsert' 'imi'        number (default 0)
                        local to buffer
        Specifies whether :lmap or an Input Method (IM) is to be used in
        Insert mode.  Valid values:
                0       :lmap is off and IM is off
                1       :lmap is ON and IM is off
                2       :lmap is off and IM is ON
        To always reset the option to zero when leaving Insert mode with <Esc>
        this can be used: 
                :inoremap <ESC> <ESC>:set iminsert=0<CR>
       This makes :lmap and IM turn off automatically when leaving Insert
        mode.
        Note that this option changes when using CTRL-^ in Insert mode
        i_CTRL-^.
        The value is set to 1 when setting 'keymap' to a valid keymap name.
        It is also used for the argument of commands like "r" and "f".

                                                'imsearch' 'ims'
'imsearch' 'ims'        number (default -1)
                        local to buffer
        Specifies whether :lmap or an Input Method (IM) is to be used when
        entering a search pattern.  Valid values:
                -1      the value of 'iminsert' is used, makes it look like
                        'iminsert' is also used when typing a search pattern
                0       :lmap is off and IM is off
                1       :lmap is ON and IM is off
                2       :lmap is off and IM is ON
        Note that this option changes when using CTRL-^ in Command-line mode
        c_CTRL-^.
        The value is set to 1 when it is not -1 and setting the 'keymap'
        option to a valid keymap name.

                                                'inccommand' 'icm'
'inccommand' 'icm'      string  (default "nosplit")
                        global

        When nonempty, shows the effects of :substitute, :smagic,
        :snomagic and user commands with the :command-preview flag as you
        type.

        Possible values:
                nosplit Shows the effects of a command incrementally in the
                        buffer.
                split   Like "nosplit", but also shows partial off-screen
                        results in a preview window.

        If the preview for built-in commands is too slow (exceeds
        'redrawtime') then 'inccommand' is automatically disabled until
        Command-line-mode is done.

                                                'include' 'inc'
'include' 'inc'         string  (default "^\s*#\s*include")
                        global or local to buffer global-local
        Pattern to be used to find an include command.  It is a search
        pattern, just like for the "/" command (See pattern).  The default
        value is for C programs.  This option is used for the commands "[i",
        "]I", "[d", etc.
        Normally the 'isfname' option is used to recognize the file name that
        comes after the matched pattern.  But if "\zs" appears in the pattern
        then the text matched from "\zs" to the end, or until "\ze" if it
        appears, is used as the file name.  Use this to include characters
        that are not in 'isfname', such as a space.  You can then use
        'includeexpr' to process the matched text.
        See option-backslash about including spaces and backslashes.

                                                'includeexpr' 'inex'
'includeexpr' 'inex'    string  (default "")
                        local to buffer
        Expression to be used to transform the string found with the 'include'
        option to a file name.  Mostly useful to change "." to "/" for Java: 
                :set includeexpr=substitute(v:fname,'\\.','/','g')
       The "v:fname" variable will be set to the file name that was detected.

        Also used for the gf command if an unmodified file name can't be
        found.  Allows doing "gf" on the name after an 'include' statement.
        Also used for <cfile>.

        The expression will be evaluated in the sandbox when set from a
        modeline, see sandbox-option.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        It is not allowed to change text or jump to another window while
        evaluating 'includeexpr' textlock.

                                 'incsearch' 'is' 'noincsearch' 'nois'
'incsearch' 'is'        boolean (default on)
                        global
        While typing a search command, show where the pattern, as it was typed
        so far, matches.  The matched string is highlighted.  If the pattern
        is invalid or not found, nothing is shown.  The screen will be updated
        often, this is only useful on fast terminals.
        Note that the match will be shown, but the cursor will return to its
        original position when no match is found and when pressing <Esc>.  You
        still need to finish the search command with <Enter> to move the
        cursor to the match.
        You can use the CTRL-G and CTRL-T keys to move to the next and
        previous match. c_CTRL-G c_CTRL-T
        Vim only searches for about half a second.  With a complicated
        pattern and/or a lot of text the match may not be found.  This is to
        avoid that Vim hangs while you are typing the pattern.
        The hl-IncSearch highlight group determines the highlighting.
        When 'hlsearch' is on, all matched strings are highlighted too while
        typing a search command. See also: 'hlsearch'.
        If you don't want to turn 'hlsearch' on, but want to highlight all
        matches while searching, you can turn on and off 'hlsearch' with
        autocmd.  Example: 
                augroup vimrc-incsearch-highlight
                  autocmd!
                  autocmd CmdlineEnter /,\? :set hlsearch
                  autocmd CmdlineLeave /,\? :set nohlsearch
                augroup END

        CTRL-L can be used to add one character from after the current match
        to the command line.  If 'ignorecase' and 'smartcase' are set and the
        command line has no uppercase characters, the added character is
        converted to lowercase.
        CTRL-R CTRL-W can be used to add the word at the end of the current
        match, excluding the characters that were already typed.

                                                'indentexpr' 'inde'
'indentexpr' 'inde'     string  (default "")
                        local to buffer
        Expression which is evaluated to obtain the proper indent for a line.
        It is used when a new line is created, for the = operator and
        in Insert mode as specified with the 'indentkeys' option.
        When this option is not empty, it overrules the 'cindent' and
        'smartindent' indenting.  When 'lisp' is set, this option is
        overridden by the Lisp indentation algorithm.
        When 'paste' is set this option is not used for indenting.
        The expression is evaluated with v:lnum set to the line number for
        which the indent is to be computed.  The cursor is also in this line
        when the expression is evaluated (but it may be moved around).
        The expression must return the number of spaces worth of indent.  It
        can return "-1" to keep the current indent (this means 'autoindent' is
        used for the indent).
        Functions useful for computing the indent are indent(), cindent()
        and lispindent().
        The evaluation of the expression must not have side effects!  It must
        not change the text, jump to another window, etc.  Afterwards the
        cursor position is always restored, thus the cursor may be moved.
        Normally this option would be set to call a function: 
                :set indentexpr=GetMyIndent()
       Error messages will be suppressed, unless the 'debug' option contains
        "msg".
        See indent-expression.

        The expression will be evaluated in the sandbox when set from a
        modeline, see sandbox-option.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        It is not allowed to change text or jump to another window while
        evaluating 'indentexpr' textlock.


                                                'indentkeys' 'indk'
'indentkeys' 'indk'     string  (default "0{,0},0),0],:,0#,!^F,o,O,e")
                        local to buffer
        A list of keys that, when typed in Insert mode, cause reindenting of
        the current line.  Only happens if 'indentexpr' isn't empty.
        The format is identical to 'cinkeys', see indentkeys-format.
        See C-indenting and indent-expression.

                        'infercase' 'inf' 'noinfercase' 'noinf'
'infercase' 'inf'       boolean (default off)
                        local to buffer
        When doing keyword completion in insert mode ins-completion, and
        'ignorecase' is also on, the case of the match is adjusted depending
        on the typed text.  If the typed text contains a lowercase letter
        where the match has an upper case letter, the completed part is made
        lowercase.  If the typed text has no lowercase letters and the match
        has a lowercase letter where the typed text has an uppercase letter,
        and there is a letter before it, the completed part is made uppercase.
        With 'noinfercase' the match is used as-is.

                                                'isfname' 'isf'
'isfname' 'isf'         string  (default for Windows:
                             "@,48-57,/,\,.,-,_,+,,,#,$,%,{,},[,],:,@-@,!,~,="
                            otherwise: "@,48-57,/,.,-,_,+,,,#,$,%,~,=")
                        global
        The characters specified by this option are included in file names and
        path names.  Filenames are used for commands like "gf", "[i" and in
        the tags file.  It is also used for "\f" in a pattern.
        Multi-byte characters 256 and above are always included, only the
        characters up to 255 are specified with this option.
        For UTF-8 the characters 0xa0 to 0xff are included as well.
        Think twice before adding white space to this option.  Although a
        space may appear inside a file name, the effect will be that Vim
        doesn't know where a file name starts or ends when doing completion.
        It most likely works better without a space in 'isfname'.

        Note that on systems using a backslash as path separator, Vim tries to
        do its best to make it work as you would expect.  That is a bit
        tricky, since Vi originally used the backslash to escape special
        characters.  Vim will not remove a backslash in front of a normal file
        name character on these systems, but it will on Unix and alikes.  The
        '&' and '^' are not included by default, because these are special for
        cmd.exe.

        The format of this option is a list of parts, separated with commas.
        Each part can be a single character number or a range.  A range is two
        character numbers with '-' in between.  A character number can be a
        decimal number between 0 and 255 or the ASCII character itself (does
        not work for digits).  Example:
                "_,-,128-140,#-43"      (include '_' and '-' and the range
                                        128 to 140 and '#' to 43)
        If a part starts with '^', the following character number or range
        will be excluded from the option.  The option is interpreted from left
        to right.  Put the excluded character after the range where it is
        included.  To include '^' itself use it as the last character of the
        option or the end of a range.  Example:
                "^a-z,#,^"      (exclude 'a' to 'z', include '#' and '^')
        If the character is '@', all characters where isalpha() returns TRUE
        are included.  Normally these are the characters a to z and A to Z,
        plus accented characters.  To include '@' itself use "@-@".  Examples:
                "@,^a-z"        All alphabetic characters, excluding lower
                                case ASCII letters.
                "a-z,A-Z,@-@"   All letters plus the '@' character.
        A comma can be included by using it where a character number is
        expected.  Example:
                "48-57,,,_"     Digits, comma and underscore.
        A comma can be excluded by prepending a '^'.  Example:
                " -~,^,,9"      All characters from space to '~', excluding
                                comma, plus <Tab>.
        See option-backslash about including spaces and backslashes.

                                                'isident' 'isi'
'isident' 'isi'         string  (default for Windows:
                                           "@,48-57,_,128-167,224-235"
                                otherwise: "@,48-57,_,192-255")
                        global
        The characters given by this option are included in identifiers.
        Identifiers are used in recognizing environment variables and after a
        match of the 'define' option.  It is also used for "\i" in a
        pattern.  See 'isfname' for a description of the format of this
        option.  For '@' only characters up to 255 are used.
        Careful: If you change this option, it might break expanding
        environment variables.  E.g., when '/' is included and Vim tries to
        expand "$HOME/.local/state/nvim/shada/main.shada".  Maybe you should
        change 'iskeyword' instead.

                                                'iskeyword' 'isk'
'iskeyword' 'isk'       string (default: @,48-57,_,192-255)
                        local to buffer
        Keywords are used in searching and recognizing with many commands:
        "w", "*", "[i", etc.  It is also used for "\k" in a pattern.  See
        'isfname' for a description of the format of this option.  For '@'
        characters above 255 check the "word" character class (any character
        that is not white space or punctuation).
        For C programs you could use "a-z,A-Z,48-57,_,.,-,>".
        For a help file it is set to all non-blank printable characters except
        '*', '"' and '|' (so that CTRL-] on a command finds the help for that
        command).
        When the 'lisp' option is on the '-' character is always included.
        This option also influences syntax highlighting, unless the syntax
        uses :syn-iskeyword.

                                                'isprint' 'isp'
'isprint' 'isp' string  (default: "@,161-255")
                        global
        The characters given by this option are displayed directly on the
        screen.  It is also used for "\p" in a pattern.  The characters from
        space (ASCII 32) to '~' (ASCII 126) are always displayed directly,
        even when they are not included in 'isprint' or excluded.  See
        'isfname' for a description of the format of this option.

        Non-printable characters are displayed with two characters:
                  0 -  31       "^@" - "^_"
                 32 - 126       always single characters
                   127          "^?"
                128 - 159       "~@" - "~_"
                160 - 254       "| " - "|~"
                   255          "~?"
        Illegal bytes from 128 to 255 (invalid UTF-8) are
        displayed as <xx>, with the hexadecimal value of the byte.
        When 'display' contains "uhex" all unprintable characters are
        displayed as <xx>.
        The SpecialKey highlighting will be used for unprintable characters.
        hl-SpecialKey

        Multi-byte characters 256 and above are always included, only the
        characters up to 255 are specified with this option.  When a character
        is printable but it is not available in the current font, a
        replacement character will be shown.
        Unprintable and zero-width Unicode characters are displayed as <xxxx>.
        There is no option to specify these characters.

                                                'jumpoptions' 'jop'
'jumpoptions' 'jop'     string  (default "")
                        global
        List of words that change the behavior of the jumplist.
          stack         Make the jumplist behave like the tagstack or like a
                        web browser.  Relative location of entries in the
                        jumplist is preserved at the cost of discarding
                        subsequent entries when navigating backwards in the
                        jumplist and then jumping to a location.
                        jumplist-stack

          view          When moving through the jumplist, changelist,
                        alternate-file or using mark-motions try to
                        restore the mark-view in which the action occurred.

                        'joinspaces' 'js' 'nojoinspaces' 'nojs'
'joinspaces' 'js'       boolean (default off)
                        global
        Insert two spaces after a '.', '?' and '!' with a join command.
        Otherwise only one space is inserted.

                                        'keymap' 'kmp' E544
'keymap' 'kmp'          string  (default "")
                        local to buffer
        Name of a keyboard mapping.  See mbyte-keymap.
        Setting this option to a valid keymap name has the side effect of
        setting 'iminsert' to one, so that the keymap becomes effective.
        'imsearch' is also set to one, unless it was -1
        Only normal file name characters can be used, "/\*?[|<>" are illegal.

                                        'keymodel' 'km'
'keymodel' 'km'         string  (default "")
                        global
        List of comma-separated words, which enable special things that keys
        can do.  These values can be used:
           startsel     Using a shifted special key starts selection (either
                        Select mode or Visual mode, depending on "key" being
                        present in 'selectmode').
           stopsel      Using a not-shifted special key stops selection.
        Special keys in this context are the cursor keys, <End>, <Home>,
        <PageUp> and <PageDown>.
        The 'keymodel' option is set by the :behave command.

                                        'keywordprg' 'kp'
'keywordprg' 'kp'       string  (default ":Man", Windows: ":help")
                        global or local to buffer global-local
        Program to use for the K command.  Environment variables are
        expanded :set_env.  ":help" may be used to access the Vim internal
        help.  (Note that previously setting the global option to the empty
        value did this, which is now deprecated.)
        When the first character is ":", the command is invoked as a Vim
        Ex command prefixed with [count].
        When "man" or "man -s" is used, Vim will automatically translate
        a [count] for the "K" command to a section number.
        See option-backslash about including spaces and backslashes.
        Example: 
                :set keywordprg=man\ -s
                :set keywordprg=:Man
       This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                        'langmap' 'lmap' E357 E358
'langmap' 'lmap'        string  (default "")
                        global
        This option allows switching your keyboard into a special language
        mode.  When you are typing text in Insert mode the characters are
        inserted directly.  When in Normal mode the 'langmap' option takes
        care of translating these special characters to the original meaning
        of the key.  This means you don't have to change the keyboard mode to
        be able to execute Normal mode commands.
        This is the opposite of the 'keymap' option, where characters are
        mapped in Insert mode.
        Also consider setting 'langremap' to off, to prevent 'langmap' from
        applying to characters resulting from a mapping.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

        Example (for Greek, in UTF-8):                          greek  
            :set langmap=ΑA,ΒB,ΨC,ΔD,ΕE,ΦF,ΓG,ΗH,ΙI,ΞJ,ΚK,ΛL,ΜM,ΝN,ΟO,ΠP,QQ,ΡR,ΣS,ΤT,ΘU,ΩV,WW,ΧX,ΥY,ΖZ,αa,βb,ψc,δd,εe,φf,γg,ηh,ιi,ξj,κk,λl,μm,νn,οo,πp,qq,ρr,σs,τt,θu,ωv,ςw,χx,υy,ζz
       Example (exchanges meaning of z and y for commands): 
            :set langmap=zy,yz,ZY,YZ

        The 'langmap' option is a list of parts, separated with commas.  Each
        part can be in one of two forms:
        1.  A list of pairs.  Each pair is a "from" character immediately
            followed by the "to" character.  Examples: "aA", "aAbBcC".
        2.  A list of "from" characters, a semi-colon and a list of "to"
            characters.  Example: "abc;ABC"
        Example: "aA,fgh;FGH,cCdDeE"
        Special characters need to be preceded with a backslash.  These are
        ";", ',', '"', '|' and backslash itself.

        This will allow you to activate vim actions without having to switch
        back and forth between the languages.  Your language characters will
        be understood as normal vim English characters (according to the
        langmap mappings) in the following cases:
         o Normal/Visual mode (commands, buffer/register names, user mappings)
         o Insert/Replace Mode: Register names after CTRL-R
         o Insert/Replace Mode: Mappings
        Characters entered in Command-line mode will NOT be affected by
        this option.   Note that this option can be changed at any time
        allowing to switch between mappings for different languages/encodings.
        Use a mapping to avoid having to type it each time!

                                        'langmenu' 'lm'
'langmenu' 'lm'         string  (default "")
                        global
        Language to use for menu translation.  Tells which file is loaded
        from the "lang" directory in 'runtimepath': 
                "lang/menu_" .. &langmenu .. ".vim"
       (without the spaces).  For example, to always use the Dutch menus, no
        matter what $LANG is set to: 
                :set langmenu=nl_NL.ISO_8859-1
       When 'langmenu' is empty, v:lang is used.
        Only normal file name characters can be used, "/\*?[|<>" are illegal.
        If your $LANG is set to a non-English language but you do want to use
        the English menus: 
                :set langmenu=none
       This option must be set before loading menus, switching on filetype
        detection or syntax highlighting.  Once the menus are defined setting
        this option has no effect.  But you could do this: 
                :source $VIMRUNTIME/delmenu.vim
                :set langmenu=de_DE.ISO_8859-1
                :source $VIMRUNTIME/menu.vim
       Warning: This deletes all menus that you defined yourself!

                        'langremap' 'lrm' 'nolangremap' 'nolrm'
'langremap' 'lrm'       boolean (default off)
                        global
        When off, setting 'langmap' does not apply to characters resulting from
        a mapping.  If setting 'langmap' disables some of your mappings, make
        sure this option is off.

                                        'laststatus' 'ls'
'laststatus' 'ls'       number  (default 2)
                        global
        The value of this option influences when the last window will have a
        status line:
                0: never
                1: only if there are at least two windows
                2: always
                3: always and ONLY the last window
        The screen looks nicer with a status line if you have several
        windows, but it takes another screen line. status-line

                        'lazyredraw' 'lz' 'nolazyredraw' 'nolz'
'lazyredraw' 'lz'       boolean (default off)
                        global
        When this option is set, the screen will not be redrawn while
        executing macros, registers and other commands that have not been
        typed.  Also, updating the window title is postponed.  To force an
        update use :redraw.
        This may occasionally cause display errors.  It is only meant to be set
        temporarily when performing an operation where redrawing may cause
        flickering or cause a slow down.

                        'linebreak' 'lbr' 'nolinebreak' 'nolbr'
'linebreak' 'lbr'       boolean (default off)
                        local to window
        If on, Vim will wrap long lines at a character in 'breakat' rather
        than at the last character that fits on the screen.  Unlike
        'wrapmargin' and 'textwidth', this does not insert <EOL>s in the file,
        it only affects the way the file is displayed, not its contents.
        If 'breakindent' is set, line is visually indented. Then, the value
        of 'showbreak' is used to put in front of wrapped lines. This option
        is not used when the 'wrap' option is off.
        Note that <Tab> characters after an <EOL> are mostly not displayed
        with the right amount of white space.

                                                'lines' E593
'lines'                 number  (default 24 or terminal height)
                        global
        Number of lines of the Vim window.
        Normally you don't need to set this.  It is done automatically by the
        terminal initialization code.
        When Vim is running in the GUI or in a resizable window, setting this
        option will cause the window size to be changed.  When you only want
        to use the size for the GUI, put the command in your gvimrc file.
        Vim limits the number of lines to what fits on the screen.  You can
        use this command to get the tallest window possible: 
                :set lines=999
       Minimum value is 2, maximum value is 1000.

                                                'linespace' 'lsp'
'linespace' 'lsp'       number  (default 0)
                        global
                        {only in the GUI}
        Number of pixel lines inserted between characters.  Useful if the font
        uses the full character cell height, making lines touch each other.
        When non-zero there is room for underlining.
        With some fonts there can be too much room between lines (to have
        space for ascents and descents).  Then it makes sense to set
        'linespace' to a negative value.  This may cause display problems
        though!

                                                'lisp' 'nolisp'
'lisp'                  boolean (default off)
                        local to buffer
        Lisp mode: When <Enter> is typed in insert mode set the indent for
        the next line to Lisp standards (well, sort of).  Also happens with
        "cc" or "S".  'autoindent' must also be on for this to work.  The 'p'
        flag in 'cpoptions' changes the method of indenting: Vi compatible or
        better.  Also see 'lispwords'.
        The '-' character is included in keyword characters.  Redefines the
        "=" operator to use this same indentation algorithm rather than
        calling an external program if 'equalprg' is empty.
        This option is not used when 'paste' is set.

                                                'lispwords' 'lw'
'lispwords' 'lw'        string  (default is very long)
                        global or local to buffer global-local
        Comma-separated list of words that influence the Lisp indenting when
        enabled with the 'lisp' option.

                                                'list' 'nolist'
'list'                  boolean (default off)
                        local to window
        List mode: By default, show tabs as ">", trailing spaces as "-", and
        non-breakable space characters as "+". Useful to see the difference
        between tabs and spaces and for trailing blanks. Further changed by
        the 'listchars' option.

        The cursor is displayed at the start of the space a Tab character
        occupies, not at the end as usual in Normal mode.  To get this cursor
        position while displaying Tabs with spaces, use: 
                :set list lcs=tab:\ \ 

        Note that list mode will also affect formatting (set with 'textwidth'
        or 'wrapmargin') when 'cpoptions' includes 'L'.  See 'listchars' for
        changing the way tabs are displayed.

                                                'listchars' 'lcs'
'listchars' 'lcs'       string  (default: "tab:> ,trail:-,nbsp:+")
                        global or local to window global-local
        Strings to use in 'list' mode and for the :list command.  It is a
        comma-separated list of string settings.

                                                        lcs-eol
          eol:c         Character to show at the end of each line.  When
                        omitted, there is no extra character at the end of the
                        line.
                                                        lcs-tab
          tab:xy[z]     Two or three characters to be used to show a tab.
                        The third character is optional.

          tab:xy        The 'x' is always used, then 'y' as many times as will
                        fit.  Thus "tab:>-" displays:
                                >
                                >-
                                >--
                                etc.

          tab:xyz       The 'z' is always used, then 'x' is prepended, and
                        then 'y' is used as many times as will fit.  Thus
                        "tab:<->" displays:
                                >
                                <>
                                <->
                                <-->
                                etc.

                        When "tab:" is omitted, a tab is shown as ^I.
                                                        lcs-space
          space:c       Character to show for a space.  When omitted, spaces
                        are left blank.
                                                        lcs-multispace
          multispace:c...
                        One or more characters to use cyclically to show for
                        multiple consecutive spaces.  Overrides the "space"
                        setting, except for single spaces.  When omitted, the
                        "space" setting is used.  For example,
                        `:set listchars=multispace:---+` shows ten consecutive
                        spaces as:
                                ---+---+-- 
                                                        lcs-lead
          lead:c        Character to show for leading spaces.  When omitted,
                        leading spaces are blank.  Overrides the "space" and
                        "multispace" settings for leading spaces.  You can
                        combine it with "tab:", for example: 
                                :set listchars+=tab:>-,lead:.
                                                       lcs-leadmultispace
          leadmultispace:c...
                        Like the lcs-multispace value, but for leading
                        spaces only.  Also overrides lcs-lead for leading
                        multiple spaces.
                        `:set listchars=leadmultispace:---+` shows ten
                        consecutive leading spaces as:
                                ---+---+--XXX 
                        Where "XXX" denotes the first non-blank characters in
                        the line.
                                                        lcs-trail
          trail:c       Character to show for trailing spaces.  When omitted,
                        trailing spaces are blank.  Overrides the "space" and
                        "multispace" settings for trailing spaces.
                                                        lcs-extends
          extends:c     Character to show in the last column, when 'wrap' is
                        off and the line continues beyond the right of the
                        screen.
                                                        lcs-precedes
          precedes:c    Character to show in the first visible column of the
                        physical line, when there is text preceding the
                        character visible in the first column.
                                                        lcs-conceal
          conceal:c     Character to show in place of concealed text, when
                        'conceallevel' is set to 1.  A space when omitted.
                                                        lcs-nbsp
          nbsp:c        Character to show for a non-breakable space character
                        (0xA0 (160 decimal) and U+202F).  Left blank when
                        omitted.

        The characters ':' and ',' should not be used.  UTF-8 characters can
        be used.  All characters must be single width.

        Each character can be specified as hex: 
                set listchars=eol:\\x24
                set listchars=eol:\\u21b5
                set listchars=eol:\\U000021b5
       Note that a double backslash is used.  The number of hex characters
        must be exactly 2 for \\x, 4 for \\u and 8 for \\U.

        Examples: 
            :set lcs=tab:>-,trail:-
            :set lcs=tab:>-,eol:<,nbsp:%
            :set lcs=extends:>,precedes:<
       hl-NonText highlighting will be used for "eol", "extends" and
        "precedes". hl-Whitespace for "nbsp", "space", "tab", "multispace",
        "lead" and "trail".

                        'lpl' 'nolpl' 'loadplugins' 'noloadplugins'
'loadplugins' 'lpl'     boolean (default on)
                        global
        When on the plugin scripts are loaded when starting up load-plugins.
        This option can be reset in your vimrc file to disable the loading
        of plugins.
        Note that using the "-u NONE" and "--noplugin" command line arguments
        reset this option. -u --noplugin

                                                'magic' 'nomagic'
'magic'                 boolean (default on)
                        global
        Changes the special characters that can be used in search patterns.
        See pattern.
        WARNING: Switching this option off most likely breaks plugins!  That
        is because many patterns assume it's on and will fail when it's off.
        Only switch it off when working with old Vi scripts.  In any other
        situation write patterns that work when 'magic' is on.  Include "\M"
        when you want to /\M.

                                                'makeef' 'mef'
'makeef' 'mef'          string  (default: "")
                        global
        Name of the errorfile for the :make command (see :make_makeprg)
        and the :grep command.
        When it is empty, an internally generated temp file will be used.
        When "##" is included, it is replaced by a number to make the name
        unique.  This makes sure that the ":make" command doesn't overwrite an
        existing file.
        NOT used for the ":cf" command.  See 'errorfile' for that.
        Environment variables are expanded :set_env.
        See option-backslash about including spaces and backslashes.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                        'makeencoding' 'menc'
'makeencoding' 'menc'   string  (default "")
                        global or local to buffer global-local
        Encoding used for reading the output of external commands.  When empty,
        encoding is not converted.
        This is used for :make, :lmake, :grep, :lgrep, :grepadd,
        :lgrepadd, :cfile, :cgetfile, :caddfile, :lfile, :lgetfile,
        and :laddfile.

        This would be mostly useful when you use MS-Windows.  If iconv is
        enabled, setting 'makeencoding' to "char" has the same effect as
        setting to the system locale encoding.  Example: 
                :set makeencoding=char  " system locale is used

                                                'makeprg' 'mp'
'makeprg' 'mp'          string  (default "make")
                        global or local to buffer global-local
        Program to use for the ":make" command.  See :make_makeprg.
        This option may contain '%' and '#' characters (see  :_% and :_#),
        which are expanded to the current and alternate file name.  Use ::S
        to escape file names in case they contain special characters.
        Environment variables are expanded :set_env.  See option-backslash
        about including spaces and backslashes.
        Note that a '|' must be escaped twice: once for ":set" and once for
        the interpretation of a command.  When you use a filter called
        "myfilter" do it like this: 
            :set makeprg=gmake\ \\\|\ myfilter
       The placeholder "$*" can be given (even multiple times) to specify
        where the arguments will be included, for example: 
            :set makeprg=latex\ \\\\nonstopmode\ \\\\input\\{$*}
       This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'matchpairs' 'mps'
'matchpairs' 'mps'      string  (default "(:),{:},[:]")
                        local to buffer
        Characters that form pairs.  The % command jumps from one to the
        other.
        Only character pairs are allowed that are different, thus you cannot
        jump between two double quotes.
        The characters must be separated by a colon.
        The pairs must be separated by a comma.  Example for including '<' and
        '>' (for HTML): 
                :set mps+=<:>

       A more exotic example, to jump between the '=' and ';' in an
        assignment, useful for languages like C and Java: 
                :au FileType c,cpp,java set mps+==:;

       For a more advanced way of using "%", see the matchit.vim plugin in
        the $VIMRUNTIME/plugin directory. add-local-help

                                                'matchtime' 'mat'
'matchtime' 'mat'       number  (default 5)
                        global
        Tenths of a second to show the matching paren, when 'showmatch' is
        set.  Note that this is not in milliseconds, like other options that
        set a time.  This is to be compatible with Nvi.

                                                'maxfuncdepth' 'mfd'
'maxfuncdepth' 'mfd'    number  (default 100)
                        global
        Maximum depth of function calls for user functions.  This normally
        catches endless recursion.  When using a recursive function with
        more depth, set 'maxfuncdepth' to a bigger number.  But this will use
        more memory, there is the danger of failing when memory is exhausted.
        Increasing this limit above 200 also changes the maximum for Ex
        command recursion, see E169.
        See also :function.

                                                'maxmapdepth' 'mmd' E223
'maxmapdepth' 'mmd'     number  (default 1000)
                        global
        Maximum number of times a mapping is done without resulting in a
        character to be used.  This normally catches endless mappings, like
        ":map x y" with ":map y x".  It still does not catch ":map g wg",
        because the 'w' is used before the next mapping is done.  See also
        key-mapping.

                                                'maxmempattern' 'mmp'
'maxmempattern' 'mmp'   number  (default 1000)
                        global
        Maximum amount of memory (in Kbyte) to use for pattern matching.
        The maximum value is about 2000000.  Use this to work without a limit.
                                                        E363
        When Vim runs into the limit it gives an error message and mostly
        behaves like CTRL-C was typed.
        Running into the limit often means that the pattern is very
        inefficient or too complex.  This may already happen with the pattern
        "\(.\)*" on a very long line.  ".*" works much better.
        Might also happen on redraw, when syntax rules try to match a complex
        text structure.
        Vim may run out of memory before hitting the 'maxmempattern' limit, in
        which case you get an "Out of memory" error instead.

                                                'menuitems' 'mis'
'menuitems' 'mis'       number  (default 25)
                        global
        Maximum number of items to use in a menu.  Used for menus that are
        generated from a list of items, e.g., the Buffers menu.  Changing this
        option has no direct effect, the menu must be refreshed first.

                                                'mkspellmem' 'msm'
'mkspellmem' 'msm'      string  (default "460000,2000,500")
                        global
        Parameters for :mkspell.  This tunes when to start compressing the
        word tree.  Compression can be slow when there are many words, but
        it's needed to avoid running out of memory.  The amount of memory used
        per word depends very much on how similar the words are, that's why
        this tuning is complicated.

        There are three numbers, separated by commas:
                {start},{inc},{added}

        For most languages the uncompressed word tree fits in memory.  {start}
        gives the amount of memory in Kbyte that can be used before any
        compression is done.  It should be a bit smaller than the amount of
        memory that is available to Vim.

        When going over the {start} limit the {inc} number specifies the
        amount of memory in Kbyte that can be allocated before another
        compression is done.  A low number means compression is done after
        less words are added, which is slow.  A high number means more memory
        will be allocated.

        After doing compression, {added} times 1024 words can be added before
        the {inc} limit is ignored and compression is done when any extra
        amount of memory is needed.  A low number means there is a smaller
        chance of hitting the {inc} limit, less memory is used but it's
        slower.

        The languages for which these numbers are important are Italian and
        Hungarian.  The default works for when you have about 512 Mbyte.  If
        you have 1 Gbyte you could use: 
                :set mkspellmem=900000,3000,800
       If you have less than 512 Mbyte :mkspell may fail for some
        languages, no matter what you set 'mkspellmem' to.

        This option cannot be set from a modeline or in the sandbox.

                                   'modeline' 'ml' 'nomodeline' 'noml'
'modeline' 'ml'         boolean (default: on (off for root))
                        local to buffer
        If 'modeline' is on 'modelines' gives the number of lines that is
        checked for set commands.  If 'modeline' is off or 'modelines' is zero
        no lines are checked.  See modeline.

                           'modelineexpr' 'mle' 'nomodelineexpr' 'nomle'
'modelineexpr' 'mle'    boolean (default: off)
                        global
        When on allow some options that are an expression to be set in the
        modeline.  Check the option for whether it is affected by
        'modelineexpr'.  Also see modeline.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'modelines' 'mls'
'modelines' 'mls'       number  (default 5)
                        global
        If 'modeline' is on 'modelines' gives the number of lines that is
        checked for set commands.  If 'modeline' is off or 'modelines' is zero
        no lines are checked.  See modeline.

                                'modifiable' 'ma' 'nomodifiable' 'noma' E21
'modifiable' 'ma'       boolean (default on)
                        local to buffer
        When off the buffer contents cannot be changed.  The 'fileformat' and
        'fileencoding' options also can't be changed.
        Can be reset on startup with the -M command line argument.

                                'modified' 'mod' 'nomodified' 'nomod'
'modified' 'mod'        boolean (default off)
                        local to buffer
        When on, the buffer is considered to be modified.  This option is set
        when:
        1. A change was made to the text since it was last written.  Using the
           undo command to go back to the original text will reset the
           option.  But undoing changes that were made before writing the
           buffer will set the option again, since the text is different from
           when it was written.
        2. 'fileformat' or 'fileencoding' is different from its original
           value.  The original value is set when the buffer is read or
           written.  A ":set nomodified" command also resets the original
           values to the current values and the 'modified' option will be
           reset.
           Similarly for 'eol' and 'bomb'.
        This option is not set when a change is made to the buffer as the
        result of a BufNewFile, BufRead/BufReadPost, BufWritePost,
        FileAppendPost or VimLeave autocommand event.  See gzip-example for
        an explanation.
        When 'buftype' is "nowrite" or "nofile" this option may be set, but
        will be ignored.
        Note that the text may actually be the same, e.g. 'modified' is set
        when using "rA" on an "A".

                                                'more' 'nomore'
'more'                  boolean (default: on)
                        global
        When on, listings pause when the whole screen is filled.  You will get
        the more-prompt.  When this option is off there are no pauses, the
        listing continues until finished.

                                                'mouse'
'mouse'                 string  (default "nvi")
                        global

        Enables mouse support. For example, to enable the mouse in Normal mode
        and Visual mode: 
                :set mouse=nv

        To temporarily disable mouse support, hold the shift key while using
        the mouse.

        Mouse support can be enabled for different modes:
                n       Normal mode
                v       Visual mode
                i       Insert mode
                c       Command-line mode
                h       all previous modes when editing a help file
                a       all previous modes
                r       for hit-enter and more-prompt prompt

        Left-click anywhere in a text buffer to place the cursor there.  This
        works with operators too, e.g. type d then left-click to delete text
        from the current cursor position to the position where you clicked.

        Drag the status-line or vertical separator of a window to resize it.

        If enabled for "v" (Visual mode) then double-click selects word-wise,
        triple-click makes it line-wise, and quadruple-click makes it
        rectangular block-wise.

        For scrolling with a mouse wheel see scroll-mouse-wheel.

        Note: When enabling the mouse in a terminal, copy/paste will use the
        "* register if possible. See also 'clipboard'.

        Related options:
        'mousefocus'    window focus follows mouse pointer
        'mousemodel'    what mouse button does which action
        'mousehide'     hide mouse pointer while typing text
        'selectmode'    whether to start Select mode or Visual mode

        The :behave command provides some "profiles" for mouse behavior.
                                                                :behave :be
        :be[have] {model}       Set behavior for mouse and selection.  Valid
                                arguments are:
                                   mswin        MS-Windows behavior
                                   xterm        Xterm behavior

                                Using ":behave" changes these options:
                                option          mswin                   xterm   
                                'selectmode'    "mouse,key"             ""
                                'mousemodel'    "popup"                 "extend"
                                'keymodel'      "startsel,stopsel"      ""
                                'selection'     "exclusive"             "inclusive"


                        'mousefocus' 'mousef' 'nomousefocus' 'nomousef'
'mousefocus' 'mousef'   boolean (default off)
                        global
        The window that the mouse pointer is on is automatically activated.
        When changing the window layout or window focus in another way, the
        mouse pointer is moved to the window with keyboard focus.  Off is the
        default because it makes using the pull down menus a little goofy, as
        a pointer transit may activate a window unintentionally.

                        'mousehide' 'mh' 'nomousehide' 'nomh'
'mousehide' 'mh'        boolean (default on)
                        global
                        {only works in the GUI}
        When on, the mouse pointer is hidden when characters are typed.
        The mouse pointer is restored when the mouse is moved.

                                                'mousemodel' 'mousem'
'mousemodel' 'mousem'   string  (default "popup_setpos")
                        global
        Sets the model to use for the mouse.  The name mostly specifies what
        the right mouse button is used for:
           extend       Right mouse button extends a selection.  This works
                        like in an xterm.
           popup        Right mouse button pops up a menu.  The shifted left
                        mouse button extends a selection.  This works like
                        with Microsoft Windows.
           popup_setpos Like "popup", but the cursor will be moved to the
                        position where the mouse was clicked, and thus the
                        selected operation will act upon the clicked object.
                        If clicking inside a selection, that selection will
                        be acted upon, i.e. no cursor move.  This implies of
                        course, that right clicking outside a selection will
                        end Visual mode.
        Overview of what button does what for each model:
        mouse               extend              popup(_setpos) 
        left click          place cursor        place cursor
        left drag           start selection     start selection
        shift-left          search word         extend selection
        right click         extend selection    popup menu (place cursor)
        right drag          extend selection    -
        middle click        paste               paste

        In the "popup" model the right mouse button produces a pop-up menu.
        Nvim creates a default popup-menu but you can redefine it.

        Note that you can further refine the meaning of buttons with mappings.
        See mouse-overview.  But mappings are NOT used for modeless selection.

        Example: 
           :map <S-LeftMouse>     <RightMouse>
           :map <S-LeftDrag>      <RightDrag>
           :map <S-LeftRelease>   <RightRelease>
           :map <2-S-LeftMouse>   <2-RightMouse>
           :map <2-S-LeftDrag>    <2-RightDrag>
           :map <2-S-LeftRelease> <2-RightRelease>
           :map <3-S-LeftMouse>   <3-RightMouse>
           :map <3-S-LeftDrag>    <3-RightDrag>
           :map <3-S-LeftRelease> <3-RightRelease>
           :map <4-S-LeftMouse>   <4-RightMouse>
           :map <4-S-LeftDrag>    <4-RightDrag>
           :map <4-S-LeftRelease> <4-RightRelease>

        Mouse commands requiring the CTRL modifier can be simulated by typing
        the "g" key before using the mouse:
            "g<LeftMouse>"  is "<C-LeftMouse>   (jump to tag under mouse click)
            "g<RightMouse>" is "<C-RightMouse>  ("CTRL-T")

        The 'mousemodel' option is set by the :behave command.

                                                'mousemoveevent' 'mousemev'
'mousemoveevent' 'mousemev'  boolean    (default off)
                        global
        When on, mouse move events are delivered to the input queue and are
        available for mapping. The default, off, avoids the mouse movement
        overhead except when needed.
        Warning: Setting this option can make pending mappings to be aborted
        when the mouse is moved.

                                                'mousescroll'
'mousescroll'           string  (default "ver:3,hor:6")
                        global
        This option controls the number of lines / columns to scroll by when
        scrolling with a mouse. The option is a comma separated list of parts.
        Each part consists of a direction and a count as follows:
                direction:count,direction:count
        Direction is one of either "hor" or "ver". "hor" controls horizontal
        scrolling and "ver" controls vertical scrolling. Count sets the amount
        to scroll by for the given direction, it should be a non negative
        integer. Each direction should be set at most once. If a direction
        is omitted, a default value is used (6 for horizontal scrolling and 3
        for vertical scrolling). You can disable mouse scrolling by using
        a count of 0.

        Example: 
                :set mousescroll=ver:5,hor:2
       Will make Nvim scroll 5 lines at a time when scrolling vertically, and
        scroll 2 columns at a time when scrolling horizontally.

                                        'mouseshape' 'mouses' E547
'mouseshape' 'mouses'   string  (default "i:beam,r:beam,s:updown,sd:cross,
                                        m:no,ml:up-arrow,v:rightup-arrow")
                        global
        This option tells Vim what the mouse pointer should look like in
        different modes.  The option is a comma-separated list of parts, much
        like used for 'guicursor'.  Each part consist of a mode/location-list
        and an argument-list:
                mode-list:shape,mode-list:shape,..
        The mode-list is a dash separated list of these modes/locations:
                        In a normal window: 
                n       Normal mode
                v       Visual mode
                ve      Visual mode with 'selection' "exclusive" (same as 'v',
                        if not specified)
                o       Operator-pending mode
                i       Insert mode
                r       Replace mode

                        Others: 
                c       appending to the command-line
                ci      inserting in the command-line
                cr      replacing in the command-line
                m       at the 'Hit ENTER' or 'More' prompts
                ml      idem, but cursor in the last line
                e       any mode, pointer below last window
                s       any mode, pointer on a status line
                sd      any mode, while dragging a status line
                vs      any mode, pointer on a vertical separator line
                vd      any mode, while dragging a vertical separator line
                a       everywhere

        The shape is one of the following:
        avail   name            looks like 
        w x     arrow           Normal mouse pointer
        w x     blank           no pointer at all (use with care!)
        w x     beam            I-beam
        w x     updown          up-down sizing arrows
        w x     leftright       left-right sizing arrows
        w x     busy            The system's usual busy pointer
        w x     no              The system's usual 'no input' pointer
          x     udsizing        indicates up-down resizing
          x     lrsizing        indicates left-right resizing
          x     crosshair       like a big thin +
          x     hand1           black hand
          x     hand2           white hand
          x     pencil          what you write with
          x     question        big ?
          x     rightup-arrow   arrow pointing right-up
        w x     up-arrow        arrow pointing up
          x     <number>        any X11 pointer number (see X11/cursorfont.h)

        The "avail" column contains a 'w' if the shape is available for Win32,
        x for X11.
        Any modes not specified or shapes not available use the normal mouse
        pointer.

        Example: 
                :set mouseshape=s:udsizing,m:no
       will make the mouse turn to a sizing arrow over the status lines and
        indicate no input when the hit-enter prompt is displayed (since
        clicking the mouse has no effect in this state.)

                                                'mousetime' 'mouset'
'mousetime' 'mouset'    number  (default 500)
                        global
        Defines the maximum time in msec between two mouse clicks for the
        second click to be recognized as a multi click.

                                                        'nrformats' 'nf'
'nrformats' 'nf'        string  (default "bin,hex")
                        local to buffer
        This defines what bases Vim will consider for numbers when using the
        CTRL-A and CTRL-X commands for adding to and subtracting from a number
        respectively; see CTRL-A for more info on these commands.
        alpha   If included, single alphabetical characters will be
                incremented or decremented.  This is useful for a list with a
                letter index a), b), etc.               octal-nrformats
        octal   If included, numbers that start with a zero will be considered
                to be octal.  Example: Using CTRL-A on "007" results in "010".
        hex     If included, numbers starting with "0x" or "0X" will be
                considered to be hexadecimal.  Example: Using CTRL-X on
                "0x100" results in "0x0ff".
        bin     If included, numbers starting with "0b" or "0B" will be
                considered to be binary.  Example: Using CTRL-X on
                "0b1000" subtracts one, resulting in "0b0111".
        unsigned    If included, numbers are recognized as unsigned. Thus a
                leading dash or negative sign won't be considered as part of
                the number.  Examples:
                    Using CTRL-X on "2020" in "9-2020" results in "9-2019"
                    (without "unsigned" it would become "9-2021").
                    Using CTRL-A on "2020" in "9-2020" results in "9-2021"
                    (without "unsigned" it would become "9-2019").
                    Using CTRL-X on "0" or CTRL-A on "18446744073709551615"
                    (2^64 - 1) has no effect, overflow is prevented.
        Numbers which simply begin with a digit in the range 1-9 are always
        considered decimal.  This also happens for numbers that are not
        recognized as octal or hex.

                                'number' 'nu' 'nonumber' 'nonu'
'number' 'nu'           boolean (default off)
                        local to window
        Print the line number in front of each line.  When the 'n' option is
        excluded from 'cpoptions' a wrapped line will not use the column of
        line numbers.
        Use the 'numberwidth' option to adjust the room for the line number.
        When a long, wrapped line doesn't start with the first character, '-'
        characters are put before the number.
        For highlighting see hl-LineNr, hl-CursorLineNr, and the
        :sign-define "numhl" argument.
                                                number_relativenumber
        The 'relativenumber' option changes the displayed number to be
        relative to the cursor.  Together with 'number' there are these
        four combinations (cursor in line 3):

                'nonu'          'nu'            'nonu'          'nu'
                'nornu'         'nornu'         'rnu'           'rnu'

            |apple          |  1 apple      |  2 apple      |  2 apple
            |pear           |  2 pear       |  1 pear       |  1 pear
            |nobody         |  3 nobody     |  0 nobody     |3   nobody
            |there          |  4 there      |  1 there      |  1 there

                                                'numberwidth' 'nuw'
'numberwidth' 'nuw'     number  (default: 4)
                        local to window
        Minimal number of columns to use for the line number.  Only relevant
        when the 'number' or 'relativenumber' option is set or printing lines
        with a line number. Since one space is always between the number and
        the text, there is one less character for the number itself.
        The value is the minimum width.  A bigger width is used when needed to
        fit the highest line number in the buffer respectively the number of
        rows in the window, depending on whether 'number' or 'relativenumber'
        is set. Thus with the Vim default of 4 there is room for a line number
        up to 999. When the buffer has 1000 lines five columns will be used.
        The minimum value is 1, the maximum value is 20.

                                                'omnifunc' 'ofu'
'omnifunc' 'ofu'        string  (default: empty)
                        local to buffer
        This option specifies a function to be used for Insert mode omni
        completion with CTRL-X CTRL-O. i_CTRL-X_CTRL-O
        See complete-functions for an explanation of how the function is
        invoked and what it should return.
        This option is usually set by a filetype plugin:
        :filetype-plugin-on
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.


                            'opendevice' 'odev' 'noopendevice' 'noodev'
'opendevice' 'odev'     boolean (default off)
                        global
                        {only for Windows}
        Enable reading and writing from devices.  This may get Vim stuck on a
        device that can be opened but doesn't actually do the I/O.  Therefore
        it is off by default.
        Note that on Windows editing "aux.h", "lpt1.txt" and the like also
        result in editing a device.


                                                'operatorfunc' 'opfunc'
'operatorfunc' 'opfunc' string  (default: empty)
                        global
        This option specifies a function to be called by the g@ operator.
        See :map-operator for more info and an example.  The value can be
        the name of a function, a lambda or a Funcref. See
        option-value-function for more information.

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                'packpath' 'pp'
'packpath' 'pp'         string  (default: see 'runtimepath')
        Directories used to find packages.  See packages and rtp-packages.


                                                'paragraphs' 'para'
'paragraphs' 'para'     string  (default "IPLPPPQPP TPHPLIPpLpItpplpipbp")
                        global
        Specifies the nroff macros that separate paragraphs.  These are pairs
        of two letters (see object-motions).

                                                'paste' 'nopaste'
'paste'                 boolean (default off)
                        global
        This option is obsolete; bracketed-paste-mode is built-in.

        Put Vim in Paste mode.  This is useful if you want to cut or copy
        some text from one window and paste it in Vim.  This will avoid
        unexpected effects.
        Setting this option is useful when using Vim in a terminal, where Vim
        cannot distinguish between typed text and pasted text.  In the GUI, Vim
        knows about pasting and will mostly do the right thing without 'paste'
        being set.  The same is true for a terminal where Vim handles the
        mouse clicks itself.
        This option is reset when starting the GUI.  Thus if you set it in
        your vimrc it will work in a terminal, but not in the GUI.  Setting
        'paste' in the GUI has side effects: e.g., the Paste toolbar button
        will no longer work in Insert mode, because it uses a mapping.
        When the 'paste' option is switched on (also when it was already on):
                - mapping in Insert mode and Command-line mode is disabled
                - abbreviations are disabled
                - 'autoindent' is reset
                - 'expandtab' is reset
                - 'hkmap' is reset
                - 'revins' is reset
                - 'ruler' is reset
                - 'showmatch' is reset
                - 'smarttab' is reset
                - 'softtabstop' is set to 0
                - 'textwidth' is set to 0
                - 'wrapmargin' is set to 0
                - 'varsofttabstop' is made empty
        These options keep their value, but their effect is disabled:
                - 'cindent'
                - 'formatoptions' is used like it is empty
                - 'indentexpr'
                - 'lisp'
                - 'smartindent'
        NOTE: When you start editing another file while the 'paste' option is
        on, settings from the modelines or autocommands may change the
        settings again, causing trouble when pasting text.  You might want to
        set the 'paste' option again.
        When the 'paste' option is reset the mentioned options are restored to
        the value before the moment 'paste' was switched from off to on.
        Resetting 'paste' before ever setting it does not have any effect.
        Since mapping doesn't work while 'paste' is active, you need to use
        the 'pastetoggle' option to toggle the 'paste' option with some key.

                                                'pastetoggle' 'pt'
'pastetoggle' 'pt'      string  (default "")
                        global
        When non-empty, specifies the key sequence that toggles the 'paste'
        option.  This is like specifying a mapping: 
            :map {keys} :set invpaste<CR>
       Where {keys} is the value of 'pastetoggle'.
        The difference is that it will work even when 'paste' is set.
        'pastetoggle' works in Insert mode and Normal mode, but not in
        Command-line mode.
        Mappings are checked first, thus overrule 'pastetoggle'.  However,
        when 'paste' is on mappings are ignored in Insert mode, thus you can do
        this: 
            :map <F10> :set paste<CR>
            :map <F11> :set nopaste<CR>
            :imap <F10> <C-O>:set paste<CR>
            :imap <F11> <nop>
            :set pastetoggle=<F11>
       This will make <F10> start paste mode and <F11> stop paste mode.
        Note that typing <F10> in paste mode inserts "<F10>", since in paste
        mode everything is inserted literally, except the 'pastetoggle' key
        sequence.
        When the value has several bytes 'ttimeoutlen' applies.

                                                'pex' 'patchexpr'
'patchexpr' 'pex'       string  (default "")
                        global
        Expression which is evaluated to apply a patch to a file and generate
        the resulting new version of the file.  See diff-patchexpr.

                                        'patchmode' 'pm' E205 E206
'patchmode' 'pm'        string  (default "")
                        global
        When non-empty the oldest version of a file is kept.  This can be used
        to keep the original version of a file if you are changing files in a
        source distribution.  Only the first time that a file is written a
        copy of the original file will be kept.  The name of the copy is the
        name of the original file with the string in the 'patchmode' option
        appended.  This option should start with a dot.  Use a string like
        ".orig" or ".org".  'backupdir' must not be empty for this to work
        (Detail: The backup file is renamed to the patchmode file after the
        new file has been successfully written, that's why it must be possible
        to write a backup file).  If there was no file to be backed up, an
        empty file is created.
        When the 'backupskip' pattern matches, a patchmode file is not made.
        Using 'patchmode' for compressed files appends the extension at the
        end (e.g., "file.gz.orig"), thus the resulting name isn't always
        recognized as a compressed file.
        Only normal file name characters can be used, "/\*?[|<>" are illegal.

                                'path' 'pa' E343 E345 E347 E854
'path' 'pa'             string  (default on Unix: ".,/usr/include,,"
                                   other systems: ".,,")
                        global or local to buffer global-local
        This is a list of directories which will be searched when using the
        gf, [f, ]f, ^Wf, :find, :sfind, :tabfind and other commands,
        provided that the file being searched for has a relative path (not
        starting with "/", "./" or "../").  The directories in the 'path'
        option may be relative or absolute.
        - Use commas to separate directory names: 
                :set path=.,/usr/local/include,/usr/include
       - Spaces can also be used to separate directory names (for backwards
          compatibility with version 3.0).  To have a space in a directory
          name, precede it with an extra backslash, and escape the space: 
                :set path=.,/dir/with\\\ space
       - To include a comma in a directory name precede it with an extra
          backslash: 
                :set path=.,/dir/with\\,comma
       - To search relative to the directory of the current file, use: 
                :set path=.
       - To search in the current directory use an empty string between two
          commas: 
                :set path=,,
       - A directory name may end in a ':' or '/'.
        - Environment variables are expanded :set_env.
        - When using netrw.vim URLs can be used.  For example, adding
          "https://www.vim.org" will make ":find index.html" work.
        - Search upwards and downwards in a directory tree using "*", "**" and
          ";".  See file-searching for info and syntax.
        - Careful with '\' characters, type two to get one in the option: 
                :set path=.,c:\\include
         Or just use '/' instead: 
                :set path=.,c:/include
       Don't forget "." or files won't even be found in the same directory as
        the file!
        The maximum length is limited.  How much depends on the system, mostly
        it is something like 256 or 1024 characters.
        You can check if all the include files are found, using the value of
        'path', see :checkpath.
        The use of :set+= and :set-= is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.  To remove the current directory use: 
                :set path-=
       To add the current directory use: 
                :set path+=
       To use an environment variable, you probably need to replace the
        separator.  Here is an example to append $INCL, in which directory
        names are separated with a semi-colon: 
                :let &path = &path .. "," .. substitute($INCL, ';', ',', 'g')
       Replace the ';' with a ':' or whatever separator is used.  Note that
        this doesn't work when $INCL contains a comma or white space.

                        'preserveindent' 'pi' 'nopreserveindent' 'nopi'
'preserveindent' 'pi'   boolean (default off)
                        local to buffer
        When changing the indent of the current line, preserve as much of the
        indent structure as possible.  Normally the indent is replaced by a
        series of tabs followed by spaces as required (unless 'expandtab' is
        enabled, in which case only spaces are used).  Enabling this option
        means the indent will preserve as many existing characters as possible
        for indenting, and only add additional tabs or spaces as required.
        'expandtab' does not apply to the preserved white space, a Tab remains
        a Tab.
        NOTE: When using ">>" multiple times the resulting indent is a mix of
        tabs and spaces.  You might not like this.
        Also see 'copyindent'.
        Use :retab to clean up white space.

                                        'previewheight' 'pvh'
'previewheight' 'pvh'   number (default 12)
                        global
        Default height for a preview window.  Used for :ptag and associated
        commands.  Used for CTRL-W_} when no count is given.

                                        'previewwindow' 'nopreviewwindow'
                                        'pvw' 'nopvw' E590
'previewwindow' 'pvw'   boolean (default off)
                        local to window
        Identifies the preview window.  Only one window can have this option
        set.  It's normally not set directly, but by using one of the commands
        :ptag, :pedit, etc.

                                                'printdevice' 'pdev'
'printdevice' 'pdev'    string  (default empty)
                        global
        The name of the printer to be used for :hardcopy.
        See pdev-option.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'printencoding' 'penc'
'printencoding' 'penc'  string  (default empty, except for some systems)
                        global
        Sets the character encoding used when printing.
        See penc-option.

                                                'printexpr' 'pexpr'
'printexpr' 'pexpr'     string  (default: see below)
                        global
        Expression used to print the PostScript produced with :hardcopy.
        See pexpr-option.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'printfont' 'pfn'
'printfont' 'pfn'       string  (default "courier")
                        global
        The name of the font that will be used for :hardcopy.
        See pfn-option.

                                                'printheader' 'pheader'
'printheader' 'pheader'  string  (default "%<%f%h%m%=Page %N")
                        global
        The format of the header produced in :hardcopy output.
        See pheader-option.

                                                'printmbcharset' 'pmbcs'
'printmbcharset' 'pmbcs'  string (default "")
                        global
        The CJK character set to be used for CJK output from :hardcopy.
        See pmbcs-option.

                                                'printmbfont' 'pmbfn'
'printmbfont' 'pmbfn'   string (default "")
                        global
        List of font names to be used for CJK output from :hardcopy.
        See pmbfn-option.

                                                'printoptions' 'popt'
'printoptions' 'popt' string (default "")
                        global
        List of items that control the format of the output of :hardcopy.
        See popt-option.

                                                'pumblend' 'pb'
'pumblend' 'pb'         number  (default 0)
                        global
        Enables pseudo-transparency for the popup-menu. Valid values are in
        the range of 0 for fully opaque popupmenu (disabled) to 100 for fully
        transparent background. Values between 0-30 are typically most useful.

        It is possible to override the level for individual highlights within
        the popupmenu using highlight-blend. For instance, to enable
        transparency but force the current selected element to be fully opaque: 

                :set pumblend=15
                :hi PmenuSel blend=0

        UI-dependent. Works best with RGB colors. 'termguicolors'

                                                'pumheight' 'ph'
'pumheight' 'ph'        number  (default 0)
                        global
        Maximum number of items to show in the popup menu
        (ins-completion-menu). Zero means "use available screen space".

                                                'pumwidth' 'pw'
'pumwidth' 'pw'         number  (default 15)
                        global
        Minimum width for the popup menu (ins-completion-menu).  If the
        cursor column + 'pumwidth' exceeds screen width, the popup menu is
        nudged to fit on the screen.

                                                'pyxversion' 'pyx'
'pyxversion' 'pyx'      number  (default 3)
                        global
        Specifies the python version used for pyx* functions and commands
        python_x.  As only Python 3 is supported, this always has the value
        3. Setting any other value is an error.

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'quickfixtextfunc' 'qftf'
'quickfixtextfunc' 'qftf'       string (default "")
                        global
        This option specifies a function to be used to get the text to display
        in the quickfix and location list windows.  This can be used to
        customize the information displayed in the quickfix or location window
        for each entry in the corresponding quickfix or location list.  See
        quickfix-window-function for an explanation of how to write the
        function and an example.  The value can be the name of a function, a
        lambda or a Funcref. See option-value-function for more
        information.

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'quoteescape' 'qe'
'quoteescape' 'qe'      string  (default "\")
                        local to buffer
        The characters that are used to escape quotes in a string.  Used for
        objects like a', a" and a` a'.
        When one of the characters in this option is found inside a string,
        the following character will be skipped.  The default value makes the
        text "foo\"bar\\" considered to be one string.

                                   'readonly' 'ro' 'noreadonly' 'noro'
'readonly' 'ro'         boolean (default off)
                        local to buffer
        If on, writes fail unless you use a '!'.  Protects you from
        accidentally overwriting a file.  Default on when Vim is started
        in read-only mode ("vim -R") or when the executable is called "view".
        When using ":w!" the 'readonly' option is reset for the current
        buffer, unless the 'Z' flag is in 'cpoptions'.
        When using the ":view" command the 'readonly' option is set for the
        newly edited buffer.
        See 'modifiable' for disallowing changes to the buffer.

                                                'redrawdebug' 'rdb'
'redrawdebug' 'rdb'     string  (default '')
                        global
        Flags to change the way redrawing works, for debugging purposes.
        Most useful with 'writedelay' set to some reasonable value.
        Supports the following flags:
            compositor  Indicate what redraws come from the compositor
                        by briefly flashing the redrawn regions in colors
                        indicating the redraw type. These are the highlight
                        groups used (and their default colors):
                RedrawDebugNormal   gui=reverse   normal redraw passed through
                RedrawDebugClear    guibg=Yellow  clear event passed through
                RedrawDebugComposed guibg=Green   redraw event modified by the
                                                  compositor (due to
                                                  overlapping grids, etc)
                RedrawDebugRecompose guibg=Red    redraw generated by the
                                                  compositor itself, due to a
                                                  grid being moved or deleted.
            nothrottle  Turn off throttling of the message grid. This is an
                        optimization that joins many small scrolls to one
                        larger scroll when drawing the message area (with
                        'display' msgsep flag active).
            invalid     Enable stricter checking (abort) of inconsistencies
                        of the internal screen state. This is mostly
                        useful when running nvim inside a debugger (and
                        the test suite).
            nodelta     Send all internally redrawn cells to the UI, even if
                        they are unchanged from the already displayed state.

                                                'redrawtime' 'rdt'
'redrawtime' 'rdt'      number  (default 2000)
                        global
        Time in milliseconds for redrawing the display.  Applies to
        'hlsearch', 'inccommand', :match highlighting and syntax
        highlighting.
        When redrawing takes more than this many milliseconds no further
        matches will be highlighted.
        For syntax highlighting the time applies per window.  When over the
        limit syntax highlighting is disabled until CTRL-L is used.
        This is used to avoid that Vim hangs when using a very complicated
        pattern.

                                                'regexpengine' 're'
'regexpengine' 're'     number  (default 0)
                        global
        This selects the default regexp engine. two-engines
        The possible values are:
                0       automatic selection
                1       old engine
                2       NFA engine
        Note that when using the NFA engine and the pattern contains something
        that is not supported the pattern will not match.  This is only useful
        for debugging the regexp engine.
        Using automatic selection enables Vim to switch the engine, if the
        default engine becomes too costly.  E.g., when the NFA engine uses too
        many states.  This should prevent Vim from hanging on a combination of
        a complex pattern with long text.

                'relativenumber' 'rnu' 'norelativenumber' 'nornu'
'relativenumber' 'rnu'  boolean (default off)
                        local to window
        Show the line number relative to the line with the cursor in front of
        each line. Relative line numbers help you use the count you can
        precede some vertical motion commands (e.g. j k + -) with, without
        having to calculate it yourself. Especially useful in combination with
        other commands (e.g. y d c < > gq gw =).
        When the 'n' option is excluded from 'cpoptions' a wrapped
        line will not use the column of line numbers.
        The 'numberwidth' option can be used to set the room used for the line
        number.
        When a long, wrapped line doesn't start with the first character, '-'
        characters are put before the number.
        See hl-LineNr  and hl-CursorLineNr for the highlighting used for
        the number.

        The number in front of the cursor line also depends on the value of
        'number', see number_relativenumber for all combinations of the two
        options.

                                                'report'
'report'                number  (default 2)
                        global
        Threshold for reporting number of lines changed.  When the number of
        changed lines is more than 'report' a message will be given for most
        ":" commands.  If you want it always, set 'report' to 0.
        For the ":substitute" command the number of substitutions is used
        instead of the number of lines.

                                'revins' 'ri' 'norevins' 'nori'
'revins' 'ri'           boolean (default off)
                        global
        Inserting characters in Insert mode will work backwards.  See "typing
        backwards" ins-reverse.  This option can be toggled with the CTRL-_
        command in Insert mode, when 'allowrevins' is set.
        This option is reset when 'paste' is set and restored when 'paste' is
        reset.

                                 'rightleft' 'rl' 'norightleft' 'norl'
'rightleft' 'rl'        boolean (default off)
                        local to window
        When on, display orientation becomes right-to-left, i.e., characters
        that are stored in the file appear from the right to the left.
        Using this option, it is possible to edit files for languages that
        are written from the right to the left such as Hebrew and Arabic.
        This option is per window, so it is possible to edit mixed files
        simultaneously, or to view the same file in both ways (this is
        useful whenever you have a mixed text file with both right-to-left
        and left-to-right strings so that both sets are displayed properly
        in different windows).  Also see rileft.txt.

                        'rightleftcmd' 'rlc'
'rightleftcmd' 'rlc'    string  (default "search")
                        local to window
        Each word in this option enables the command line editing to work in
        right-to-left mode for a group of commands:

                search          "/" and "?" commands

        This is useful for languages such as Hebrew, Arabic and Farsi.
        The 'rightleft' option must be set for 'rightleftcmd' to take effect.

                                         'ruler' 'ru' 'noruler' 'noru'
'ruler' 'ru'            boolean (default on)
                        global
        Show the line and column number of the cursor position, separated by a
        comma.  When there is room, the relative position of the displayed
        text in the file is shown on the far right:
                Top     first line is visible
                Bot     last line is visible
                All     first and last line are visible
                45%     relative position in the file
        If 'rulerformat' is set, it will determine the contents of the ruler.
        Each window has its own ruler.  If a window has a status line, the
        ruler is shown there.  If a window doesn't have a status line and
        'cmdheight' is zero, the ruler is not shown.  Otherwise it is shown in
        the last line of the screen.  If the statusline is given by
        'statusline' (i.e. not empty), this option takes precedence over
        'ruler' and 'rulerformat'.
        If the number of characters displayed is different from the number of
        bytes in the text (e.g., for a TAB or a multibyte character), both
        the text column (byte number) and the screen column are shown,
        separated with a dash.
        For an empty line "0-1" is shown.
        For an empty buffer the line number will also be zero: "0,0-1".
        This option is reset when 'paste' is set and restored when 'paste' is
        reset.
        If you don't want to see the ruler all the time but want to know where
        you are, use "g CTRL-G" g_CTRL-G.

                                                'rulerformat' 'ruf'
'rulerformat' 'ruf'     string  (default empty)
                        global
        When this option is not empty, it determines the content of the ruler
        string, as displayed for the 'ruler' option.
        The format of this option is like that of 'statusline'.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        The default ruler width is 17 characters.  To make the ruler 15
        characters wide, put "%15(" at the start and "%)" at the end.
        Example: 
                :set rulerformat=%15(%c%V\ %p%%%)

                                'runtimepath' 'rtp' vimfiles
'runtimepath' 'rtp'     string  (default:     "$XDG_CONFIG_HOME/nvim,
                                               $XDG_CONFIG_DIRS[1]/nvim,
                                               $XDG_CONFIG_DIRS[2]/nvim,
                                               …
                                               $XDG_DATA_HOME/nvim[-data]/site,
                                               $XDG_DATA_DIRS[1]/nvim/site,
                                               $XDG_DATA_DIRS[2]/nvim/site,
                                               …
                                               $VIMRUNTIME,
                                               …
                                               $XDG_DATA_DIRS[2]/nvim/site/after,
                                               $XDG_DATA_DIRS[1]/nvim/site/after,
                                               $XDG_DATA_HOME/nvim[-data]/site/after,
                                               …
                                               $XDG_CONFIG_DIRS[2]/nvim/after,
                                               $XDG_CONFIG_DIRS[1]/nvim/after,
                                               $XDG_CONFIG_HOME/nvim/after")
                        global
        List of directories to be searched for these runtime files:
          filetype.vim  filetypes by file name new-filetype
          scripts.vim   filetypes by file contents new-filetype-scripts
          autoload/     automatically loaded scripts autoload-functions
          colors/       color scheme files :colorscheme
          compiler/     compiler files :compiler
          doc/          documentation write-local-help
          ftplugin/     filetype plugins write-filetype-plugin
          indent/       indent scripts indent-expression
          keymap/       key mapping files mbyte-keymap
          lang/         menu translations :menutrans
          lua/          Lua plugins
          menu.vim      GUI menus menu.vim
          pack/         packages :packadd
          parser/       treesitter syntax parsers
          plugin/       plugin scripts write-plugin
          print/        files for printing postscript-print-encoding
          query/        treesitter queries
          rplugin/      remote-plugin scripts
          spell/        spell checking files spell
          syntax/       syntax files mysyntaxfile
          tutor/        tutorial files :Tutor

        And any other file searched for with the :runtime command.

        Defaults are setup to search these locations:
        1. Your home directory, for personal preferences.
           Given by stdpath("config").  $XDG_CONFIG_HOME
        2. Directories which must contain configuration files according to 
           xdg ($XDG_CONFIG_DIRS, defaults to /etc/xdg).  This also contains
           preferences from system administrator.
        3. Data home directory, for plugins installed by user.
           Given by stdpath("data")/site.  $XDG_DATA_HOME
        4. nvim/site subdirectories for each directory in $XDG_DATA_DIRS.
           This is for plugins which were installed by system administrator,
           but are not part of the Nvim distribution. XDG_DATA_DIRS defaults
           to /usr/local/share/:/usr/share/, so system administrators are
           expected to install site plugins to /usr/share/nvim/site.
        5. Session state directory, for state data such as swap, backupdir,
           viewdir, undodir, etc.
           Given by stdpath("state").  $XDG_STATE_HOME
        6. $VIMRUNTIME, for files distributed with Nvim.
                                                        after-directory
        7, 8, 9, 10. In after/ subdirectories of 1, 2, 3 and 4, with reverse
           ordering.  This is for preferences to overrule or add to the
           distributed defaults or system-wide settings (rarely needed).

                                                        packages-runtimepath
        "start" packages will also be searched (runtime-search-path) for
        runtime files after these, though such packages are not explicitly
        reported in &runtimepath. But "opt" packages are explicitly added to
        &runtimepath by :packadd.

        Note that, unlike 'path', no wildcards like "**" are allowed.  Normal
        wildcards are allowed, but can significantly slow down searching for
        runtime files.  For speed, use as few items as possible and avoid
        wildcards.
        See :runtime.
        Example: 
                :set runtimepath=~/vimruntime,/mygroup/vim,$VIMRUNTIME
       This will use the directory "~/vimruntime" first (containing your
        personal Nvim runtime files), then "/mygroup/vim", and finally
        "$VIMRUNTIME" (the default runtime files).
        You can put a directory before $VIMRUNTIME to find files which replace
        distributed runtime files.  You can put a directory after $VIMRUNTIME
        to find files which add to distributed runtime files.

        With --clean the home directory entries are not included.

                                                'scroll' 'scr'
'scroll' 'scr'          number  (default: half the window height)
                        local to window
        Number of lines to scroll with CTRL-U and CTRL-D commands.  Will be
        set to half the number of lines in the window when the window size
        changes.  This may happen when enabling the status-line or
        'tabline' option after setting the 'scroll' option.
        If you give a count to the CTRL-U or CTRL-D command it will
        be used as the new value for 'scroll'.  Reset to half the window
        height with ":set scroll=0".

                                                'scrollback' 'scbk'
'scrollback' 'scbk'     number  (default: 10000)
                        local to buffer
        Maximum number of lines kept beyond the visible screen. Lines at the
        top are deleted if new lines exceed this limit.
        Minimum is 1, maximum is 100000.
        Only in terminal buffers.

                        'scrollbind' 'scb' 'noscrollbind' 'noscb'
'scrollbind' 'scb'      boolean  (default off)
                        local to window
        See also scroll-binding.  When this option is set, the current
        window scrolls as other scrollbind windows (windows that also have
        this option set) scroll.  This option is useful for viewing the
        differences between two versions of a file, see 'diff'.
        See 'scrollopt' for options that determine how this option should be
        interpreted.
        This option is mostly reset when splitting a window to edit another
        file.  This means that ":split | edit file" results in two windows
        with scroll-binding, but ":split file" does not.

                                                'scrolljump' 'sj'
'scrolljump' 'sj'       number  (default 1)
                        global
        Minimal number of lines to scroll when the cursor gets off the
        screen (e.g., with "j").  Not used for scroll commands (e.g., CTRL-E,
        CTRL-D).  Useful if your terminal scrolls very slowly.
        When set to a negative number from -1 to -100 this is used as the
        percentage of the window height.  Thus -50 scrolls half the window
        height.

                                                'scrolloff' 'so'
'scrolloff' 'so'        number  (default 0)
                        global or local to window global-local
        Minimal number of screen lines to keep above and below the cursor.
        This will make some context visible around where you are working.  If
        you set it to a very large value (999) the cursor line will always be
        in the middle of the window (except at the start or end of the file or
        when long lines wrap).
        After using the local value, go back the global value with one of
        these two: 
                setlocal scrolloff<
                setlocal scrolloff=-1
       For scrolling horizontally see 'sidescrolloff'.

                                                'scrollopt' 'sbo'
'scrollopt' 'sbo'       string  (default "ver,jump")
                        global
        This is a comma-separated list of words that specifies how
        'scrollbind' windows should behave.  'sbo' stands for ScrollBind
        Options.
        The following words are available:
            ver         Bind vertical scrolling for 'scrollbind' windows
            hor         Bind horizontal scrolling for 'scrollbind' windows
            jump        Applies to the offset between two windows for vertical
                        scrolling.  This offset is the difference in the first
                        displayed line of the bound windows.  When moving
                        around in a window, another 'scrollbind' window may
                        reach a position before the start or after the end of
                        the buffer.  The offset is not changed though, when
                        moving back the 'scrollbind' window will try to scroll
                        to the desired position when possible.
                        When now making that window the current one, two
                        things can be done with the relative offset:
                        1. When "jump" is not included, the relative offset is
                           adjusted for the scroll position in the new current
                           window.  When going back to the other window, the
                           new relative offset will be used.
                        2. When "jump" is included, the other windows are
                           scrolled to keep the same relative offset.  When
                           going back to the other window, it still uses the
                           same relative offset.
        Also see scroll-binding.
        When 'diff' mode is active there always is vertical scroll binding,
        even when "ver" isn't there.

                                                'sections' 'sect'
'sections' 'sect'       string  (default "SHNHH HUnhsh")
                        global
        Specifies the nroff macros that separate sections.  These are pairs of
        two letters (See object-motions).  The default makes a section start
        at the nroff macros ".SH", ".NH", ".H", ".HU", ".nh" and ".sh".

                                                'secure' 'nosecure' E523
'secure'                boolean (default off)
                        global
        When on, ":autocmd", shell and write commands are not allowed in
        ".nvimrc" and ".exrc" in the current directory and map commands are
        displayed.  Switch it off only if you know that you will not run into
        problems, or when the 'exrc' option is off.  On Unix this option is
        only used if the ".nvimrc" or ".exrc" is not owned by you.  This can be
        dangerous if the systems allows users to do a "chown".  You better set
        'secure' at the end of your init.vim then.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'selection' 'sel'
'selection' 'sel'       string  (default "inclusive")
                        global
        This option defines the behavior of the selection.  It is only used
        in Visual and Select mode.
        Possible values:
           value        past line     inclusive 
           old             no           yes
           inclusive       yes          yes
           exclusive       yes          no
        "past line" means that the cursor is allowed to be positioned one
        character past the line.
        "inclusive" means that the last character of the selection is included
        in an operation.  For example, when "x" is used to delete the
        selection.
        When "old" is used and 'virtualedit' allows the cursor to move past
        the end of line the line break still isn't included.
        Note that when "exclusive" is used and selecting from the end
        backwards, you cannot include the last character of a line, when
        starting in Normal mode and 'virtualedit' empty.

        The 'selection' option is set by the :behave command.

                                                'selectmode' 'slm'
'selectmode' 'slm'      string  (default "")
                        global
        This is a comma-separated list of words, which specifies when to start
        Select mode instead of Visual mode, when a selection is started.
        Possible values:
           mouse        when using the mouse
           key          when using shifted special keys
           cmd          when using "v", "V" or CTRL-V
        See Select-mode.
        The 'selectmode' option is set by the :behave command.

                                                'sessionoptions' 'ssop'
'sessionoptions' 'ssop' string  (default: "blank,buffers,curdir,folds,
                                               help,tabpages,winsize,terminal")
                        global
        Changes the effect of the :mksession command.  It is a comma-
        separated list of words.  Each word enables saving and restoring
        something:
           word         save and restore 
           blank        empty windows
           buffers      hidden and unloaded buffers, not just those in windows
           curdir       the current directory
           folds        manually created folds, opened/closed folds and local
                        fold options
           globals      global variables that start with an uppercase letter
                        and contain at least one lowercase letter.  Only
                        String and Number types are stored.
           help         the help window
           localoptions options and mappings local to a window or buffer (not
                        global values for local options)
           options      all options and mappings (also global values for local
                        options)
           skiprtp      exclude 'runtimepath' and 'packpath' from the options
           resize       size of the Vim window: 'lines' and 'columns'
           sesdir       the directory in which the session file is located
                        will become the current directory (useful with
                        projects accessed over a network from different
                        systems)
           tabpages     all tab pages; without this only the current tab page
                        is restored, so that you can make a session for each
                        tab page separately
           terminal     include terminal windows where the command can be
                        restored
           winpos       position of the whole Vim window
           winsize      window sizes
           slash        deprecated Always enabled. Uses "/" in filenames.
           unix         deprecated Always enabled. Uses "\n" line endings.

        Don't include both "curdir" and "sesdir". When neither is included
        filenames are stored as absolute paths.
        If you leave out "options" many things won't work well after restoring
        the session.
                                'shada' 'sd' E526 E527 E528
'shada' 'sd'            string  (default for
                                   Win32:  !,'100,<50,s10,h,rA:,rB:
                                   others: !,'100,<50,s10,h)
                        global
        When non-empty, the shada file is read upon startup and written
        when exiting Vim (see shada-file).  The string should be a comma-
        separated list of parameters, each consisting of a single character
        identifying the particular parameter, followed by a number or string
        which specifies the value of that parameter.  If a particular
        character is left out, then the default value is used for that
        parameter.  The following is a list of the identifying characters and
        the effect of their value.
        CHAR    VALUE   
                                                        shada-!
        !       When included, save and restore global variables that start
                with an uppercase letter, and don't contain a lowercase
                letter.  Thus "KEEPTHIS and "K_L_M" are stored, but "KeepThis"
                and "_K_L_M" are not.  Nested List and Dict items may not be
                read back correctly, you end up with an empty item.
                                                        shada-quote
        "       Maximum number of lines saved for each register.  Old name of
                the '<' item, with the disadvantage that you need to put a
                backslash before the ", otherwise it will be recognized as the
                start of a comment!
                                                        shada-%
        %       When included, save and restore the buffer list.  If Vim is
                started with a file name argument, the buffer list is not
                restored.  If Vim is started without a file name argument, the
                buffer list is restored from the shada file.  Quickfix 
                ('buftype'), unlisted ('buflisted'), unnamed and buffers on 
                removable media (shada-r) are not saved.
                When followed by a number, the number specifies the maximum
                number of buffers that are stored.  Without a number all
                buffers are stored.
                                                        shada-'
        '       Maximum number of previously edited files for which the marks
                are remembered.  This parameter must always be included when
                'shada' is non-empty.
                Including this item also means that the jumplist and the
                changelist are stored in the shada file.
                                                        shada-/
        /       Maximum number of items in the search pattern history to be
                saved.  If non-zero, then the previous search and substitute
                patterns are also saved.  When not included, the value of
                'history' is used.
                                                        shada-:
        :       Maximum number of items in the command-line history to be
                saved.  When not included, the value of 'history' is used.
                                                        shada-<
        <       Maximum number of lines saved for each register.  If zero then
                registers are not saved.  When not included, all lines are
                saved.  '"' is the old name for this item.
                Also see the 's' item below: limit specified in KiB.
                                                        shada-@
        @       Maximum number of items in the input-line history to be
                saved.  When not included, the value of 'history' is used.
                                                        shada-c
        c       Dummy option, kept for compatibility reasons.  Has no actual 
                effect: ShaDa always uses UTF-8 and 'encoding' value is fixed 
                to UTF-8 as well.
                                                        shada-f
        f       Whether file marks need to be stored.  If zero, file marks ('0
                to '9, 'A to 'Z) are not stored.  When not present or when
                non-zero, they are all stored.  '0 is used for the current
                cursor position (when exiting or when doing :wshada).
                                                        shada-h
        h       Disable the effect of 'hlsearch' when loading the shada
                file.  When not included, it depends on whether ":nohlsearch"
                has been used since the last search command.
                                                        shada-n
        n       Name of the shada file.  The name must immediately follow
                the 'n'.  Must be at the end of the option!  If the
                'shadafile' option is set, that file name overrides the one
                given here with 'shada'.  Environment variables are
                expanded when opening the file, not when setting the option.
                                                        shada-r
        r       Removable media.  The argument is a string (up to the next
                ',').  This parameter can be given several times.  Each
                specifies the start of a path for which no marks will be
                stored.  This is to avoid removable media.  For Windows you
                could use "ra:,rb:".  You can also use it for temp files,
                e.g., for Unix: "r/tmp".  Case is ignored.
                                                        shada-s
        s       Maximum size of an item contents in KiB.  If zero then nothing 
                is saved.  Unlike Vim this applies to all items, except for 
                the buffer list and header.  Full item size is off by three 
                unsigned integers: with s10 maximum item size may be 1 byte 
                (type: 7-bit integer) + 9 bytes (timestamp: up to 64-bit 
                integer) + 3 bytes (item size: up to 16-bit integer because 
                2^8 < 10240 < 2^16) + 10240 bytes (requested maximum item 
                contents size) = 10253 bytes.

        Example: 
            :set shada='50,<1000,s100,:0,n~/nvim/shada

        '50             Marks will be remembered for the last 50 files you
                        edited.
        <1000           Contents of registers (up to 1000 lines each) will be
                        remembered.
        s100            Items with contents occupying more then 100 KiB are 
                        skipped.
        :0              Command-line history will not be saved.
        n~/nvim/shada   The name of the file to use is "~/nvim/shada".
        no /            Since '/' is not specified, the default will be used,
                        that is, save all of the search history, and also the
                        previous search and substitute patterns.
        no %            The buffer list will not be saved nor read back.
        no h            'hlsearch' highlighting will be restored.

        When setting 'shada' from an empty value you can use :rshada to
        load the contents of the file, this is not done automatically.

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                'shadafile' 'sdf'
'shadafile' 'sdf'       string  (default: "")
                        global
        When non-empty, overrides the file name used for shada (viminfo).
        When equal to "NONE" no shada file will be read or written.
        This option can be set with the -i command line flag.  The --clean
        command line flag sets it to "NONE".
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'shell' 'sh' E91
'shell' 'sh'            string  (default $SHELL or "sh", Win32: "cmd.exe")
                        global
        Name of the shell to use for ! and :! commands.  When changing the
        value also check these options: 'shellpipe', 'shellslash'
        'shellredir', 'shellquote', 'shellxquote' and 'shellcmdflag'.
        It is allowed to give an argument to the command, e.g.  "csh -f".
        See option-backslash about including spaces and backslashes.
        Environment variables are expanded :set_env.

        If the name of the shell contains a space, you need to enclose it in
        quotes.  Example with quotes: 
                :set shell=\"c:\program\ files\unix\sh.exe\"\ -f
       Note the backslash before each quote (to avoid starting a comment) and 
        each space (to avoid ending the option value), so better use :let-& 
        like this: 
                :let &shell='"C:\Program Files\unix\sh.exe" -f'
       Also note that the "-f" is not inside the quotes, because it is not 
        part of the command name.
                                                        shell-unquoting
        Rules regarding quotes:
        1. Option is split on space and tab characters that are not inside 
           quotes: "abc def" runs shell named "abc" with additional argument 
           "def", '"abc def"' runs shell named "abc def" with no additional 
           arguments (here and below: additional means “additional to 
           'shellcmdflag'”).
        2. Quotes in option may be present in any position and any number: 
           '"abc"', '"a"bc', 'a"b"c', 'ab"c"' and '"a"b"c"' are all equivalent 
           to just "abc".
        3. Inside quotes backslash preceding backslash means one backslash.  
           Backslash preceding quote means one quote. Backslash preceding 
           anything else means backslash and next character literally: 
           '"a\\b"' is the same as "a\b", '"a\\"b"' runs shell named literally 
           'a"b', '"a\b"' is the same as "a\b" again.
        4. Outside of quotes backslash always means itself, it cannot be used 
           to escape quote: 'a\"b"' is the same as "a\b".
        Note that such processing is done after :set did its own round of 
        unescaping, so to keep yourself sane use :let-& like shown above.
                                                        shell-powershell
        To use PowerShell: 
                let &shell = executable('pwsh') ? 'pwsh' : 'powershell'
                let &shellcmdflag = '-NoLogo -NoProfile -ExecutionPolicy RemoteSigned -Command [Console]::InputEncoding=[Console]::OutputEncoding=[System.Text.Encoding]::UTF8;'
                let &shellredir = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
                let &shellpipe = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
                set shellquote= shellxquote=

       This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'shellcmdflag' 'shcf'
'shellcmdflag' 'shcf'   string  (default: "-c"; Windows: "/s /c")
                        global
        Flag passed to the shell to execute "!" and ":!" commands; e.g.,
        `bash.exe -c ls` or `cmd.exe /s /c "dir"`.  For MS-Windows, the
        default is set according to the value of 'shell', to reduce the need
        to set this option by the user.
        On Unix it can have more than one flag.  Each white space separated
        part is passed as an argument to the shell command.
        See option-backslash about including spaces and backslashes.
        See shell-unquoting which talks about separating this option into 
        multiple arguments.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'shellpipe' 'sp'
'shellpipe' 'sp'        string  (default ">", ">%s 2>&1", "| tee", "|& tee" or
                                 "2>&1| tee")
                        global
        String to be used to put the output of the ":make" command in the
        error file.  See also :make_makeprg.  See option-backslash about
        including spaces and backslashes.
        The name of the temporary file can be represented by "%s" if necessary
        (the file name is appended automatically if no %s appears in the value
        of this option).
        For MS-Windows the default is ">%s 2>&1".  The output is directly
        saved in a file and not echoed to the screen.
        For Unix the default is "| tee".  The stdout of the compiler is saved
        in a file and echoed to the screen.  If the 'shell' option is "csh" or
        "tcsh" after initializations, the default becomes "|& tee".  If the
        'shell' option is "sh", "ksh", "mksh", "pdksh", "zsh", "zsh-beta",
        "bash", "fish", "ash" or "dash" the default becomes "2>&1| tee".  This
        means that stderr is also included.  Before using the 'shell' option a
        path is removed, thus "/bin/sh" uses "sh".
        The initialization of this option is done after reading the vimrc
        and the other initializations, so that when the 'shell' option is set
        there, the 'shellpipe' option changes automatically, unless it was
        explicitly set before.
        When 'shellpipe' is set to an empty string, no redirection of the
        ":make" output will be done.  This is useful if you use a 'makeprg'
        that writes to 'makeef' by itself.  If you want no piping, but do
        want to include the 'makeef', set 'shellpipe' to a single space.
        Don't forget to precede the space with a backslash: ":set sp=\ ".
        In the future pipes may be used for filtering and this option will
        become obsolete (at least for Unix).
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'shellquote' 'shq'
'shellquote' 'shq'      string  (default: ""; Windows, when 'shell'
                                        contains "sh" somewhere: "\"")
                        global
        Quoting character(s), put around the command passed to the shell, for
        the "!" and ":!" commands.  The redirection is kept outside of the
        quoting.  See 'shellxquote' to include the redirection.  It's
        probably not useful to set both options.
        This is an empty string by default.  Only known to be useful for
        third-party shells on Windows systems, such as the MKS Korn Shell
        or bash, where it should be "\"".  The default is adjusted according
        the value of 'shell', to reduce the need to set this option by the
        user.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'shellredir' 'srr'
'shellredir' 'srr'      string  (default ">", ">&" or ">%s 2>&1")
                        global
        String to be used to put the output of a filter command in a temporary
        file.  See also :!.  See option-backslash about including spaces
        and backslashes.
        The name of the temporary file can be represented by "%s" if necessary
        (the file name is appended automatically if no %s appears in the value
        of this option).
        The default is ">".  For Unix, if the 'shell' option is "csh" or
        "tcsh" during initializations, the default becomes ">&".  If the
        'shell' option is "sh", "ksh", "mksh", "pdksh", "zsh", "zsh-beta",
        "bash" or "fish", the default becomes ">%s 2>&1".  This means that
        stderr is also included.  For Win32, the Unix checks are done and
        additionally "cmd" is checked for, which makes the default ">%s 2>&1".
        Also, the same names with ".exe" appended are checked for.
        The initialization of this option is done after reading the vimrc
        and the other initializations, so that when the 'shell' option is set
        there, the 'shellredir' option changes automatically unless it was
        explicitly set before.
        In the future pipes may be used for filtering and this option will
        become obsolete (at least for Unix).
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                        'shellslash' 'ssl' 'noshellslash' 'nossl'
'shellslash' 'ssl'      boolean (default off)
                        global
                        {only for MS-Windows}
        When set, a forward slash is used when expanding file names.  This is
        useful when a Unix-like shell is used instead of cmd.exe.  Backward
        slashes can still be typed, but they are changed to forward slashes by
        Vim.
        Note that setting or resetting this option has no effect for some
        existing file names, thus this option needs to be set before opening
        any file for best results.  This might change in the future.
        'shellslash' only works when a backslash can be used as a path
        separator.  To test if this is so use: 
                if exists('+shellslash')
       Also see 'completeslash'.

                        'shelltemp' 'stmp' 'noshelltemp' 'nostmp'
'shelltemp' 'stmp'      boolean (default on)
                        global
        When on, use temp files for shell commands.  When off use a pipe.
        When using a pipe is not possible temp files are used anyway.
        The advantage of using a pipe is that nobody can read the temp file
        and the 'shell' command does not need to support redirection.
        The advantage of using a temp file is that the file type and encoding
        can be detected.
        The FilterReadPre, FilterReadPost and FilterWritePre,
        FilterWritePost autocommands event are not triggered when
        'shelltemp' is off.
        system() does not respect this option, it always uses pipes.

                                                'shellxescape' 'sxe'
'shellxescape' 'sxe'    string  (default: "")
                        global
        When 'shellxquote' is set to "(" then the characters listed in this
        option will be escaped with a '^' character.  This makes it possible
        to execute most external commands with cmd.exe.

                                                'shellxquote' 'sxq'
'shellxquote' 'sxq'     string  (default: "", Windows: "\"")
                        global
        Quoting character(s), put around the command passed to the shell, for
        the "!" and ":!" commands.  Includes the redirection.  See
        'shellquote' to exclude the redirection.  It's probably not useful
        to set both options.
        When the value is '(' then ')' is appended. When the value is '"('
        then ')"' is appended.
        When the value is '(' then also see 'shellxescape'.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                        'shiftround' 'sr' 'noshiftround' 'nosr'
'shiftround' 'sr'       boolean (default off)
                        global
        Round indent to multiple of 'shiftwidth'.  Applies to > and <
        commands.  CTRL-T and CTRL-D in Insert mode always round the indent to
        a multiple of 'shiftwidth' (this is Vi compatible).

                                                'shiftwidth' 'sw'
'shiftwidth' 'sw'       number  (default 8)
                        local to buffer
        Number of spaces to use for each step of (auto)indent.  Used for
        'cindent', >>, <<, etc.
        When zero the 'ts' value will be used.  Use the shiftwidth()
        function to get the effective shiftwidth value.

                                                'shortmess' 'shm'
'shortmess' 'shm'       string  (default "filnxtToOF")
                        global
        This option helps to avoid all the hit-enter prompts caused by file
        messages, for example  with CTRL-G, and to avoid some other messages.
        It is a list of flags:
         flag   meaning when present    
          f     use "(3 of 5)" instead of "(file 3 of 5)"
          i     use "[noeol]" instead of "[Incomplete last line]"
          l     use "999L, 888B" instead of "999 lines, 888 bytes"
          m     use "[+]" instead of "[Modified]"
          n     use "[New]" instead of "[New File]"
          r     use "[RO]" instead of "[readonly]"
          w     use "[w]" instead of "written" for file write message
                and "[a]" instead of "appended" for ':w >> file' command
          x     use "[dos]" instead of "[dos format]", "[unix]" instead of
                "[unix format]" and "[mac]" instead of "[mac format]".
          a     all of the above abbreviations

          o     overwrite message for writing a file with subsequent message
                for reading a file (useful for ":wn" or when 'autowrite' on)
          O     message for reading a file overwrites any previous message.
                Also for quickfix message (e.g., ":cn").
          s     don't give "search hit BOTTOM, continuing at TOP" or "search
                hit TOP, continuing at BOTTOM" messages; when using the search
                count do not show "W" after the count message (see S below)
          t     truncate file message at the start if it is too long to fit
                on the command-line, "<" will appear in the left most column.
                Ignored in Ex mode.
          T     truncate other messages in the middle if they are too long to
                fit on the command line.  "..." will appear in the middle.
                Ignored in Ex mode.
          W     don't give "written" or "[w]" when writing a file
          A     don't give the "ATTENTION" message when an existing swap file
                is found.
          I     don't give the intro message when starting Vim :intro.
          c     don't give ins-completion-menu messages.  For example,
                "-- XXX completion (YYY)", "match 1 of 2", "The only match",
                "Pattern not found", "Back at original", etc.
          q     use "recording" instead of "recording @a"
          F     don't give the file info when editing a file, like :silent
                was used for the command
          S     do not show search count message when searching, e.g.
                "[1/5]"

        This gives you the opportunity to avoid that a change between buffers
        requires you to hit <Enter>, but still gives as useful a message as
        possible for the space available.  To get the whole message that you
        would have got with 'shm' empty, use ":file!"
        Useful values:
            shm=        No abbreviation of message.
            shm=a       Abbreviation, but no loss of information.
            shm=at      Abbreviation, and truncate message when necessary.

                                                'showbreak' 'sbr' E595
'showbreak' 'sbr'       string  (default "")
                        global or local to window global-local
        String to put at the start of lines that have been wrapped.  Useful
        values are "> " or "+++ ": 
                :set showbreak=>\ 
       Note the backslash to escape the trailing space.  It's easier like
        this: 
                :let &showbreak = '+++ '
       Only printable single-cell characters are allowed, excluding <Tab> and
        comma (in a future version the comma might be used to separate the
        part that is shown at the end and at the start of a line).
        The hl-NonText highlight group determines the highlighting.
        Note that tabs after the showbreak will be displayed differently.
        If you want the 'showbreak' to appear in between line numbers, add the
        "n" flag to 'cpoptions'.
        A window-local value overrules a global value.  If the global value is
        set and you want no value in the current window use NONE: 
                :setlocal showbreak=NONE

                                     'showcmd' 'sc' 'noshowcmd' 'nosc'
'showcmd' 'sc'          boolean (default: on)
                        global
        Show (partial) command in the last line of the screen.  Set this
        option off if your terminal is slow.
        The option has no effect when 'cmdheight' is zero.
        In Visual mode the size of the selected area is shown:
        - When selecting characters within a line, the number of characters.
          If the number of bytes is different it is also displayed: "2-6"
          means two characters and six bytes.
        - When selecting more than one line, the number of lines.
        - When selecting a block, the size in screen characters:
          {lines}x{columns}.

                        'showfulltag' 'sft' 'noshowfulltag' 'nosft'
'showfulltag' 'sft'     boolean (default off)
                        global
        When completing a word in insert mode (see ins-completion) from the
        tags file, show both the tag name and a tidied-up form of the search
        pattern (if there is one) as possible matches.  Thus, if you have
        matched a C function, you can see a template for what arguments are
        required (coding style permitting).
        Note that this doesn't work well together with having "longest" in
        'completeopt', because the completion from the search pattern may not
        match the typed text.

                                 'showmatch' 'sm' 'noshowmatch' 'nosm'
'showmatch' 'sm'        boolean (default off)
                        global
        When a bracket is inserted, briefly jump to the matching one.  The
        jump is only done if the match can be seen on the screen.  The time to
        show the match can be set with 'matchtime'.
        A Beep is given if there is no match (no matter if the match can be
        seen or not).
        This option is reset when 'paste' is set and restored when 'paste' is
        reset.
        When the 'm' flag is not included in 'cpoptions', typing a character
        will immediately move the cursor back to where it belongs.
        See the "sm" field in 'guicursor' for setting the cursor shape and
        blinking when showing the match.
        The 'matchpairs' option can be used to specify the characters to show
        matches for.  'rightleft' and 'revins' are used to look for opposite
        matches.
        Also see the matchparen plugin for highlighting the match when moving
        around pi_paren.txt.
        Note: Use of the short form is rated PG.

                                 'showmode' 'smd' 'noshowmode' 'nosmd'
'showmode' 'smd'        boolean (default: on)
                        global
        If in Insert, Replace or Visual mode put a message on the last line.
        The hl-ModeMsg highlight group determines the highlighting.
        The option has no effect when 'cmdheight' is zero.

                                                'showtabline' 'stal'
'showtabline' 'stal'    number  (default 1)
                        global
        The value of this option specifies when the line with tab page labels
        will be displayed:
                0: never
                1: only if there are at least two tab pages
                2: always
        This is both for the GUI and non-GUI implementation of the tab pages
        line.
        See tab-page for more information about tab pages.

                                                'sidescroll' 'ss'
'sidescroll' 'ss'       number  (default 1)
                        global
        The minimal number of columns to scroll horizontally.  Used only when
        the 'wrap' option is off and the cursor is moved off of the screen.
        When it is zero the cursor will be put in the middle of the screen.
        When using a slow terminal set it to a large number or 0.  Not used
        for "zh" and "zl" commands.

                                                'sidescrolloff' 'siso'
'sidescrolloff' 'siso'  number (default 0)
                        global or local to window global-local
        The minimal number of screen columns to keep to the left and to the
        right of the cursor if 'nowrap' is set.  Setting this option to a
        value greater than 0 while having 'sidescroll' also at a non-zero
        value makes some context visible in the line you are scrolling in
        horizontally (except at beginning of the line).  Setting this option
        to a large value (like 999) has the effect of keeping the cursor
        horizontally centered in the window, as long as one does not come too
        close to the beginning of the line.
        After using the local value, go back the global value with one of
        these two: 
                setlocal sidescrolloff<
                setlocal sidescrolloff=-1

        Example: Try this together with 'sidescroll' and 'listchars' as
                 in the following example to never allow the cursor to move
                 onto the "extends" character: 

                 :set nowrap sidescroll=1 listchars=extends:>,precedes:<
                 :set sidescrolloff=1

                                                'signcolumn' 'scl'
'signcolumn' 'scl'      string  (default "auto")
                        local to window
        When and how to draw the signcolumn. Valid values are:
           "auto"       only when there is a sign to display
           "auto:[1-9]" resize to accommodate multiple signs up to the
                        given number (maximum 9), e.g. "auto:4"
           "auto:[1-8]-[2-9]"
                        resize to accommodate multiple signs up to the
                        given maximum number (maximum 9) while keeping
                        at least the given minimum (maximum 8) fixed
                        space. The minimum number should always be less
                        than the maximum number, e.g. "auto:2-5"
           "no"         never
           "yes"        always
           "yes:[1-9]"  always, with fixed space for signs up to the given
                        number (maximum 9), e.g. "yes:3"
           "number"     display signs in the 'number' column. If the number
                        column is not present, then behaves like "auto".

        Note regarding 'orphaned signs': with signcolumn numbers higher than
        1, deleting lines will also remove the associated signs automatically,
        in contrast to the default Vim behavior of keeping and grouping them.
        This is done in order for the signcolumn appearance not appear weird
        during line deletion.


                        'smartcase' 'scs' 'nosmartcase' 'noscs'
'smartcase' 'scs'       boolean (default off)
                        global
        Override the 'ignorecase' option if the search pattern contains upper
        case characters.  Only used when the search pattern is typed and
        'ignorecase' option is on.  Used for the commands "/", "?", "n", "N",
        ":g" and ":s".  Not used for "*", "#", "gd", tag search, etc.  After
        "*" and "#" you can make 'smartcase' used by doing a "/" command,
        recalling the search pattern from history and hitting <Enter>.

                             'smartindent' 'si' 'nosmartindent' 'nosi'
'smartindent' 'si'      boolean (default off)
                        local to buffer
        Do smart autoindenting when starting a new line.  Works for C-like
        programs, but can also be used for other languages.  'cindent' does
        something like this, works better in most cases, but is more strict,
        see C-indenting.  When 'cindent' is on or 'indentexpr' is set,
        setting 'si' has no effect.  'indentexpr' is a more advanced
        alternative.
        Normally 'autoindent' should also be on when using 'smartindent'.
        An indent is automatically inserted:
        - After a line ending in '{'.
        - After a line starting with a keyword from 'cinwords'.
        - Before a line starting with '}' (only with the "O" command).
        When typing '}' as the first character in a new line, that line is
        given the same indent as the matching '{'.
        When typing '#' as the first character in a new line, the indent for
        that line is removed, the '#' is put in the first column.  The indent
        is restored for the next line.  If you don't want this, use this
        mapping: ":inoremap # X^H#", where ^H is entered with CTRL-V CTRL-H.
        When using the ">>" command, lines starting with '#' are not shifted
        right.
        This option is reset when 'paste' is set and restored when 'paste' is
        reset.

                                 'smarttab' 'sta' 'nosmarttab' 'nosta'
'smarttab' 'sta'        boolean (default on)
                        global
        When on, a <Tab> in front of a line inserts blanks according to
        'shiftwidth'.  'tabstop' or 'softtabstop' is used in other places.  A
        <BS> will delete a 'shiftwidth' worth of space at the start of the
        line.
        When off, a <Tab> always inserts blanks according to 'tabstop' or
        'softtabstop'.  'shiftwidth' is only used for shifting text left or
        right shift-left-right.
        What gets inserted (a <Tab> or spaces) depends on the 'expandtab'
        option.  Also see ins-expandtab.  When 'expandtab' is not set, the
        number of spaces is minimized by using <Tab>s.
        This option is reset when 'paste' is set and restored when 'paste' is
        reset.

                                        'softtabstop' 'sts'
'softtabstop' 'sts'     number  (default 0)
                        local to buffer
        Number of spaces that a <Tab> counts for while performing editing
        operations, like inserting a <Tab> or using <BS>.  It "feels" like
        <Tab>s are being inserted, while in fact a mix of spaces and <Tab>s is
        used.  This is useful to keep the 'ts' setting at its standard value
        of 8, while being able to edit like it is set to 'sts'.  However,
        commands like "x" still work on the actual characters.
        When 'sts' is zero, this feature is off.
        When 'sts' is negative, the value of 'shiftwidth' is used.
        'softtabstop' is set to 0 when the 'paste' option is set and restored
        when 'paste' is reset.
        See also ins-expandtab.  When 'expandtab' is not set, the number of
        spaces is minimized by using <Tab>s.
        The 'L' flag in 'cpoptions' changes how tabs are used when 'list' is
        set.

        The value of 'softtabstop' will be ignored if 'varsofttabstop' is set
        to anything other than an empty string.

                                                'spell' 'nospell'
'spell'                 boolean (default off)
                        local to window
        When on spell checking will be done.  See spell.
        The languages are specified with 'spelllang'.

                                                'spellcapcheck' 'spc'
'spellcapcheck' 'spc'   string  (default "[.?!]\_[\])'" \t]\+")
                        local to buffer
        Pattern to locate the end of a sentence.  The following word will be
        checked to start with a capital letter.  If not then it is highlighted
        with SpellCap hl-SpellCap (unless the word is also badly spelled).
        When this check is not wanted make this option empty.
        Only used when 'spell' is set.
        Be careful with special characters, see option-backslash about
        including spaces and backslashes.
        To set this option automatically depending on the language, see
        set-spc-auto.

                                                'spellfile' 'spf'
'spellfile' 'spf'       string  (default empty)
                        local to buffer
        Name of the word list file where words are added for the zg and zw
        commands.  It must end in ".{encoding}.add".  You need to include the
        path, otherwise the file is placed in the current directory.
                                                                E765
        It may also be a comma-separated list of names.  A count before the
        zg and zw commands can be used to access each.  This allows using
        a personal word list file and a project word list file.
        When a word is added while this option is empty Vim will set it for
        you: Using the first directory in 'runtimepath' that is writable.  If
        there is no "spell" directory yet it will be created.  For the file
        name the first language name that appears in 'spelllang' is used,
        ignoring the region.
        The resulting ".spl" file will be used for spell checking, it does not
        have to appear in 'spelllang'.
        Normally one file is used for all regions, but you can add the region
        name if you want to.  However, it will then only be used when
        'spellfile' is set to it, for entries in 'spelllang' only files
        without region name will be found.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'spelllang' 'spl'
'spelllang' 'spl'       string  (default "en")
                        local to buffer
        A comma-separated list of word list names.  When the 'spell' option is
        on spellchecking will be done for these languages.  Example: 
                set spelllang=en_us,nl,medical
       This means US English, Dutch and medical words are recognized.  Words
        that are not recognized will be highlighted.
        The word list name must consist of alphanumeric characters, a dash or
        an underscore.  It should not include a comma or dot.  Using a dash is
        recommended to separate the two letter language name from a
        specification.  Thus "en-rare" is used for rare English words.
        A region name must come last and have the form "_xx", where "xx" is
        the two-letter, lower case region name.  You can use more than one
        region by listing them: "en_us,en_ca" supports both US and Canadian
        English, but not words specific for Australia, New Zealand or Great
        Britain. (Note: currently en_au and en_nz dictionaries are older than
        en_ca, en_gb and en_us).
        If the name "cjk" is included East Asian characters are excluded from
        spell checking.  This is useful when editing text that also has Asian
        words.
        Note that the "medical" dictionary does not exist, it is just an
        example of a longer name.
                                                        E757
        As a special case the name of a .spl file can be given as-is.  The
        first "_xx" in the name is removed and used as the region name
        (_xx is an underscore, two letters and followed by a non-letter).
        This is mainly for testing purposes.  You must make sure the correct
        encoding is used, Vim doesn't check it.
        How the related spell files are found is explained here: spell-load.

        If the spellfile.vim plugin is active and you use a language name
        for which Vim cannot find the .spl file in 'runtimepath' the plugin
        will ask you if you want to download the file.

        After this option has been set successfully, Vim will source the files
        "spell/LANG.vim" in 'runtimepath'.  "LANG" is the value of 'spelllang'
        up to the first character that is not an ASCII letter or number and
        not a dash.  Also see set-spc-auto.

                                                'spelloptions' 'spo'
'spelloptions' 'spo'    string  (default "")
                        local to buffer
        A comma-separated list of options for spell checking:
        camel           When a word is CamelCased, assume "Cased" is a
                        separate word: every upper-case character in a word
                        that comes after a lower case character indicates the
                        start of a new word.
        noplainbuffer   Only spellcheck a buffer when 'syntax' is enabled,
                        or when extmarks are set within the buffer. Only
                        designated regions of the buffer are spellchecked in
                        this case.

                                                'spellsuggest' 'sps'
'spellsuggest' 'sps'    string  (default "best")
                        global
        Methods used for spelling suggestions.  Both for the z= command and
        the spellsuggest() function.  This is a comma-separated list of
        items:

        best            Internal method that works best for English.  Finds
                        changes like "fast" and uses a bit of sound-a-like
                        scoring to improve the ordering.

        double          Internal method that uses two methods and mixes the
                        results.  The first method is "fast", the other method
                        computes how much the suggestion sounds like the bad
                        word.  That only works when the language specifies
                        sound folding.  Can be slow and doesn't always give
                        better results.

        fast            Internal method that only checks for simple changes:
                        character inserts/deletes/swaps.  Works well for
                        simple typing mistakes.

        {number}        The maximum number of suggestions listed for z=.
                        Not used for spellsuggest().  The number of
                        suggestions is never more than the value of 'lines'
                        minus two.

        timeout:{millisec}   Limit the time searching for suggestions to
                        {millisec} milli seconds.  Applies to the following
                        methods.  When omitted the limit is 5000. When
                        negative there is no limit.

        file:{filename} Read file {filename}, which must have two columns,
                        separated by a slash.  The first column contains the
                        bad word, the second column the suggested good word.
                        Example:
                                theribal/terrible 
                        Use this for common mistakes that do not appear at the
                        top of the suggestion list with the internal methods.
                        Lines without a slash are ignored, use this for
                        comments.
                        The word in the second column must be correct,
                        otherwise it will not be used.  Add the word to an
                        ".add" file if it is currently flagged as a spelling
                        mistake.
                        The file is used for all languages.

        expr:{expr}     Evaluate expression {expr}.  Use a function to avoid
                        trouble with spaces.  v:val holds the badly spelled
                        word.  The expression must evaluate to a List of
                        Lists, each with a suggestion and a score.
                        Example:
                                [['the', 33], ['that', 44]] 
                        Set 'verbose' and use z= to see the scores that the
                        internal methods use.  A lower score is better.
                        This may invoke spellsuggest() if you temporarily
                        set 'spellsuggest' to exclude the "expr:" part.
                        Errors are silently ignored, unless you set the
                        'verbose' option to a non-zero value.

        Only one of "best", "double" or "fast" may be used.  The others may
        appear several times in any order.  Example: 
                :set sps=file:~/.config/nvim/sugg,best,expr:MySuggest()

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.


                        'splitbelow' 'sb' 'nosplitbelow' 'nosb'
'splitbelow' 'sb'       boolean (default off)
                        global
        When on, splitting a window will put the new window below the current
        one. :split

                        'splitright' 'spr' 'nosplitright' 'nospr'
'splitright' 'spr'      boolean (default off)
                        global
        When on, splitting a window will put the new window right of the
        current one. :vsplit

                           'startofline' 'sol' 'nostartofline' 'nosol'
'startofline' 'sol'     boolean (default off)
                        global
        When "on" the commands listed below move the cursor to the first
        non-blank of the line.  When off the cursor is kept in the same column
        (if possible).  This applies to the commands: CTRL-D, CTRL-U, CTRL-B,
        CTRL-F, "G", "H", "M", "L", gg, and to the commands "d", "<<" and ">>"
        with a linewise operator, with "%" with a count and to buffer changing
        commands (CTRL-^, :bnext, :bNext, etc.).  Also for an Ex command that
        only has a line number, e.g., ":25" or ":+".
        In case of buffer changing commands the cursor is placed at the column
        where it was the last time the buffer was edited.

                           'statusline' 'stl' E540 E542
'statusline' 'stl'      string  (default empty)
                        global or local to window global-local
        When non-empty, this option determines the content of the status line.
        Also see status-line.

        The option consists of printf style '%' items interspersed with
        normal text.  Each status line item is of the form:
          %-0{minwid}.{maxwid}{item}
        All fields except the {item} are optional.  A single percent sign can
        be given as "%%".

        When the option starts with "%!" then it is used as an expression,
        evaluated and the result is used as the option value.  Example: 
                :set statusline=%!MyStatusLine()
       The g:statusline_winid variable will be set to the window-ID of the
        window that the status line belongs to.
        The result can contain %{} items that will be evaluated too.
        Note that the "%!" expression is evaluated in the context of the
        current window and buffer, while %{} items are evaluated in the
        context of the window that the statusline belongs to.

        When there is error while evaluating the option then it will be made
        empty to avoid further errors.  Otherwise screen updating would loop.

        Note that the only effect of 'ruler' when this option is set (and
        'laststatus' is 2 or 3) is controlling the output of CTRL-G.

        field       meaning 
        -           Left justify the item.  The default is right justified
                    when minwid is larger than the length of the item.
        0           Leading zeroes in numeric items.  Overridden by '-'.
        minwid      Minimum width of the item, padding as set by '-' & '0'.
                    Value must be 50 or less.
        maxwid      Maximum width of the item.  Truncation occurs with a '<'
                    on the left for text items.  Numeric items will be
                    shifted down to maxwid-2 digits followed by '>'number
                    where number is the amount of missing digits, much like
                    an exponential notation.
        item        A one letter code as described below.

        Following is a description of the possible statusline items.  The
        second character in "item" is the type:
                N for number
                S for string
                F for flags as described below
                - not applicable

        item  meaning 
        f S   Path to the file in the buffer, as typed or relative to current
              directory.
        F S   Full path to the file in the buffer.
        t S   File name (tail) of file in the buffer.
        m F   Modified flag, text is "[+]"; "[-]" if 'modifiable' is off.
        M F   Modified flag, text is ",+" or ",-".
        r F   Readonly flag, text is "[RO]".
        R F   Readonly flag, text is ",RO".
        h F   Help buffer flag, text is "[help]".
        H F   Help buffer flag, text is ",HLP".
        w F   Preview window flag, text is "[Preview]".
        W F   Preview window flag, text is ",PRV".
        y F   Type of file in the buffer, e.g., "[vim]".  See 'filetype'.
        Y F   Type of file in the buffer, e.g., ",VIM".  See 'filetype'.
        q S   "[Quickfix List]", "[Location List]" or empty.
        k S   Value of "b:keymap_name" or 'keymap' when :lmap mappings are
              being used: "<keymap>"
        n N   Buffer number.
        b N   Value of character under cursor.
        B N   As above, in hexadecimal.
        o N   Byte number in file of byte under cursor, first byte is 1.
              Mnemonic: Offset from start of file (with one added)
        O N   As above, in hexadecimal.
        N N   Printer page number.  (Only works in the 'printheader' option.)
        l N   Line number.
        L N   Number of lines in buffer.
        c N   Column number (byte index).
        v N   Virtual column number (screen column).
        V N   Virtual column number as -{num}.  Not displayed if equal to 'c'.
        p N   Percentage through file in lines as in CTRL-G.
        P S   Percentage through file of displayed window.  This is like the
              percentage described for 'ruler'.  Always 3 in length, unless
              translated.
        a S   Argument list status as in default title.  ({current} of {max})
              Empty if the argument file count is zero or one.
        { NF  Evaluate expression between '%{' and '}' and substitute result.
              Note that there is no '%' before the closing '}'.  The
              expression cannot contain a '}' character, call a function to
              work around that.  See stl-%{ below.
        {% -  This is almost same as { except the result of the expression is
              re-evaluated as a statusline format string.  Thus if the
              return value of expr contains % items they will get expanded.
              The expression can contain the } character, the end of
              expression is denoted by %}.
              For example: 
                func! Stl_filename() abort
                    return "%t"
                endfunc
               stl=%{Stl_filename()}   results in "%t"
                stl=%{%Stl_filename()%} results in `"Name of current file"`
        %} -  End of {% expression
        ( -   Start of item group.  Can be used for setting the width and
              alignment of a section.  Must be followed by %) somewhere.
        ) -   End of item group.  No width fields allowed.
        T N   For 'tabline': start of tab page N label.  Use %T or %X to end 
              the label.  Clicking this label with left mouse button switches 
              to the specified tab page.
        X N   For 'tabline': start of close tab N label.  Use %X or %T to end 
              the label, e.g.: %3Xclose%X.  Use %999X for a "close current 
              tab" label.    Clicking this label with left mouse button closes 
              specified tab page.
        @ N   Start of execute function label. Use %X or %T to 
              end the label, e.g.: %10@SwitchBuffer@foo.c%X.  Clicking this 
              label runs specified function: in the example when clicking once 
              using left mouse button on "foo.c" "SwitchBuffer(10, 1, 'l', 
              '    ')" expression will be run.  Function receives the 
              following arguments in order:
              1. minwid field value or zero if no N was specified
              2. number of mouse clicks to detect multiple clicks
              3. mouse button used: "l", "r" or "m" for left, right or middle 
                 button respectively; one should not rely on third argument 
                 being only "l", "r" or "m": any other non-empty string value 
                 that contains only ASCII lower case letters may be expected 
                 for other mouse buttons
              4. modifiers pressed: string which contains "s" if shift 
                 modifier was pressed, "c" for control, "a" for alt and "m" 
                 for meta; currently if modifier is not pressed string 
                 contains space instead, but one should not rely on presence 
                 of spaces or specific order of modifiers: use stridx() to 
                 test whether some modifier is present; string is guaranteed 
                 to contain only ASCII letters and spaces, one letter per 
                 modifier; "?" modifier may also be present, but its presence 
                 is a bug that denotes that new mouse button recognition was 
                 added without modifying code that reacts on mouse clicks on 
                 this label.
        < -   Where to truncate line if too long.  Default is at the start.
              No width fields allowed.
        = -   Separation point between alignment sections. Each section will
              be separated by an equal number of spaces.
              No width fields allowed.
        # -   Set highlight group.  The name must follow and then a # again.
              Thus use %#HLname# for highlight group HLname.  The same
              highlighting is used, also for the statusline of non-current
              windows.
        * -   Set highlight group to User{N}, where {N} is taken from the
              minwid field, e.g. %1*.  Restore normal highlight with %* or %0*.
              The difference between User{N} and StatusLine  will be applied
              to StatusLineNC for the statusline of non-current windows.
              The number N must be between 1 and 9.  See hl-User1..9

        When displaying a flag, Vim removes the leading comma, if any, when
        that flag comes right after plaintext.  This will make a nice display
        when flags are used like in the examples below.

        When all items in a group becomes an empty string (i.e. flags that are
        not set) and a minwid is not set for the group, the whole group will
        become empty.  This will make a group like the following disappear
        completely from the statusline when none of the flags are set. 
                :set statusline=...%(\ [%M%R%H]%)...
       Beware that an expression is evaluated each and every time the status
        line is displayed.
                                stl-%{ g:actual_curbuf g:actual_curwin
        While evaluating %{} the current buffer and current window will be set
        temporarily to that of the window (and buffer) whose statusline is
        currently being drawn.  The expression will evaluate in this context.
        The variable "g:actual_curbuf" is set to the bufnr() number of the
        real current buffer and "g:actual_curwin" to the window-ID of the
        real current window.  These values are strings.

        The 'statusline' option will be evaluated in the sandbox if set from
        a modeline, see sandbox-option.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        It is not allowed to change text or jump to another window while
        evaluating 'statusline' textlock.

        If the statusline is not updated when you want it (e.g., after setting
        a variable that's used in an expression), you can force an update by
        using :redrawstatus.

        A result of all digits is regarded a number for display purposes.
        Otherwise the result is taken as flag text and applied to the rules
        described above.

        Watch out for errors in expressions.  They may render Vim unusable!
        If you are stuck, hold down ':' or 'Q' to get a prompt, then quit and
        edit your vimrc or whatever with "vim --clean" to get it right.

        Examples:
        Emulate standard status line with 'ruler' set 
          :set statusline=%<%f\ %h%m%r%=%-14.(%l,%c%V%)\ %P
       Similar, but add ASCII value of char under the cursor (like "ga") 
          :set statusline=%<%f%h%m%r%=%b\ 0x%B\ \ %l,%c%V\ %P
       Display byte count and byte value, modified flag in red. 
          :set statusline=%<%f%=\ [%1*%M%*%n%R%H]\ %-19(%3l,%02c%03V%)%O'%02b'
          :hi User1 term=inverse,bold cterm=inverse,bold ctermfg=red
       Display a ,GZ flag if a compressed file is loaded 
          :set statusline=...%r%{VarExists('b:gzflag','\ [GZ]')}%h...
       In the :autocmd's: 
          :let b:gzflag = 1
       And: 
          :unlet b:gzflag
       And define this function: 
          :function VarExists(var, val)
          :    if exists(a:var) | return a:val | else | return '' | endif
          :endfunction

                                                'suffixes' 'su'
'suffixes' 'su'         string  (default ".bak,~,.o,.h,.info,.swp,.obj")
                        global
        Files with these suffixes get a lower priority when multiple files
        match a wildcard.  See suffixes.  Commas can be used to separate the
        suffixes.  Spaces after the comma are ignored.  A dot is also seen as
        the start of a suffix.  To avoid a dot or comma being recognized as a
        separator, precede it with a backslash (see option-backslash about
        including spaces and backslashes).
        See 'wildignore' for completely ignoring files.
        The use of :set+= and :set-= is preferred when adding or removing
        suffixes from the list.  This avoids problems when a future version
        uses another default.

                                                'suffixesadd' 'sua'
'suffixesadd' 'sua'     string  (default "")
                        local to buffer
        Comma-separated list of suffixes, which are used when searching for a
        file for the "gf", "[I", etc. commands.  Example: 
                :set suffixesadd=.java

                                'swapfile' 'swf' 'noswapfile' 'noswf'
'swapfile' 'swf'        boolean (default on)
                        local to buffer
        Use a swapfile for the buffer.  This option can be reset when a
        swapfile is not wanted for a specific buffer.  For example, with
        confidential information that even root must not be able to access.
        Careful: All text will be in memory:
                - Don't use this for big files.
                - Recovery will be impossible!
        A swapfile will only be present when 'updatecount' is non-zero and
        'swapfile' is set.
        When 'swapfile' is reset, the swap file for the current buffer is
        immediately deleted.  When 'swapfile' is set, and 'updatecount' is
        non-zero, a swap file is immediately created.
        Also see swap-file.
        If you want to open a new buffer without creating a swap file for it,
        use the :noswapfile modifier.
        See 'directory' for where the swap file is created.

        This option is used together with 'bufhidden' and 'buftype' to
        specify special kinds of buffers.   See special-buffers.

                                                'switchbuf' 'swb'
'switchbuf' 'swb'       string  (default "uselast")
                        global
        This option controls the behavior when switching between buffers.
        Mostly for quickfix commands some values are also used for other
        commands, as mentioned below.
        Possible values (comma-separated list):
           useopen      If included, jump to the first open window that
                        contains the specified buffer (if there is one).
                        Otherwise: Do not examine other windows.
                        This setting is checked with quickfix commands, when
                        jumping to errors (":cc", ":cn", "cp", etc.).  It is
                        also used in all buffer related split commands, for
                        example ":sbuffer", ":sbnext", or ":sbrewind".
           usetab       Like "useopen", but also consider windows in other tab
                        pages.
           split        If included, split the current window before loading
                        a buffer for a quickfix command that display errors.
                        Otherwise: do not split, use current window (when used
                        in the quickfix window: the previously used window or
                        split if there is no other window).
           vsplit       Just like "split" but split vertically.
           newtab       Like "split", but open a new tab page.  Overrules
                        "split" when both are present.
           uselast      If included, jump to the previously used window when
                        jumping to errors with quickfix commands.

                                                'synmaxcol' 'smc'
'synmaxcol' 'smc'       number  (default 3000)
                        local to buffer
        Maximum column in which to search for syntax items.  In long lines the
        text after this column is not highlighted and following lines may not
        be highlighted correctly, because the syntax state is cleared.
        This helps to avoid very slow redrawing for an XML file that is one
        long line.
        Set to zero to remove the limit.

                                                'syntax' 'syn'
'syntax' 'syn'          string  (default empty)
                        local to buffer
        When this option is set, the syntax with this name is loaded, unless
        syntax highlighting has been switched off with ":syntax off".
        Otherwise this option does not always reflect the current syntax (the
        b:current_syntax variable does).
        This option is most useful in a modeline, for a file which syntax is
        not automatically recognized.  Example, in an IDL file:
                /* vim: set syntax=idl : */ 
        When a dot appears in the value then this separates two filetype
        names.  Example:
                /* vim: set syntax=c.doxygen : */ 
        This will use the "c" syntax first, then the "doxygen" syntax.
        Note that the second one must be prepared to be loaded as an addition,
        otherwise it will be skipped.  More than one dot may appear.
        To switch off syntax highlighting for the current file, use: 
                :set syntax=OFF
       To switch syntax highlighting on according to the current value of the
        'filetype' option: 
                :set syntax=ON
       What actually happens when setting the 'syntax' option is that the
        Syntax autocommand event is triggered with the value as argument.
        This option is not copied to another buffer, independent of the 's' or
        'S' flag in 'cpoptions'.
        Only normal file name characters can be used, "/\*?[|<>" are illegal.

                                                'tabline' 'tal'
'tabline' 'tal'         string  (default empty)
                        global
        When non-empty, this option determines the content of the tab pages
        line at the top of the Vim window.  When empty Vim will use a default
        tab pages line.  See setting-tabline for more info.

        The tab pages line only appears as specified with the 'showtabline'
        option and only when there is no GUI tab line.  When 'e' is in
        'guioptions' and the GUI supports a tab line 'guitablabel' is used
        instead.  Note that the two tab pages lines are very different.

        The value is evaluated like with 'statusline'.  You can use
        tabpagenr(), tabpagewinnr() and tabpagebuflist() to figure out
        the text to be displayed.  Use "%1T" for the first label, "%2T" for
        the second one, etc.  Use "%X" items for closing labels.

        When changing something that is used in 'tabline' that does not
        trigger it to be updated, use :redrawtabline.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        Keep in mind that only one of the tab pages is the current one, others
        are invisible and you can't jump to their windows.


                                                'tabpagemax' 'tpm'
'tabpagemax' 'tpm'      number  (default 50)
                        global
        Maximum number of tab pages to be opened by the -p command line
        argument or the ":tab all" command. tabpage


                                                'tabstop' 'ts'
'tabstop' 'ts'          number  (default 8)
                        local to buffer
        Number of spaces that a <Tab> in the file counts for.  Also see
        the :retab command, and the 'softtabstop' option.

        Note: Setting 'tabstop' to any other value than 8 can make your file
        appear wrong in many places, e.g., when printing it.
        The value must be more than 0 and less than 10000.

        There are four main ways to use tabs in Vim:
        1. Always keep 'tabstop' at 8, set 'softtabstop' and 'shiftwidth' to 4
           (or 3 or whatever you prefer) and use 'noexpandtab'.  Then Vim
           will use a mix of tabs and spaces, but typing <Tab> and <BS> will
           behave like a tab appears every 4 (or 3) characters.
        2. Set 'tabstop' and 'shiftwidth' to whatever you prefer and use
           'expandtab'.  This way you will always insert spaces.  The
           formatting will never be messed up when 'tabstop' is changed.
        3. Set 'tabstop' and 'shiftwidth' to whatever you prefer and use a
           modeline to set these values when editing the file again.  Only
           works when using Vim to edit the file.
        4. Always set 'tabstop' and 'shiftwidth' to the same value, and
           'noexpandtab'.  This should then work (for initial indents only)
           for any tabstop setting that people use.  It might be nice to have
           tabs after the first non-blank inserted as spaces if you do this
           though.  Otherwise aligned comments will be wrong when 'tabstop' is
           changed.

        The value of 'tabstop' will be ignored if 'vartabstop' is set to
        anything other than an empty string.

                        'tagbsearch' 'tbs' 'notagbsearch' 'notbs'
'tagbsearch' 'tbs'      boolean (default on)
                        global
        When searching for a tag (e.g., for the :ta command), Vim can either
        use a binary search or a linear search in a tags file.  Binary
        searching makes searching for a tag a LOT faster, but a linear search
        will find more tags if the tags file wasn't properly sorted.
        Vim normally assumes that your tags files are sorted, or indicate that
        they are not sorted.  Only when this is not the case does the
        'tagbsearch' option need to be switched off.

        When 'tagbsearch' is on, binary searching is first used in the tags
        files.  In certain situations, Vim will do a linear search instead for
        certain files, or retry all files with a linear search.  When
        'tagbsearch' is off, only a linear search is done.

        Linear searching is done anyway, for one file, when Vim finds a line
        at the start of the file indicating that it's not sorted: 
   !_TAG_FILE_SORTED    0       /some comment/
       [The whitespace before and after the '0' must be a single <Tab>]

        When a binary search was done and no match was found in any of the
        files listed in 'tags', and case is ignored or a pattern is used
        instead of a normal tag name, a retry is done with a linear search.
        Tags in unsorted tags files, and matches with different case will only
        be found in the retry.

        If a tag file indicates that it is case-fold sorted, the second,
        linear search can be avoided when case is ignored.  Use a value of '2'
        in the "!_TAG_FILE_SORTED" line for this.  A tag file can be case-fold
        sorted with the -f switch to "sort" in most unices, as in the command:
        "sort -f -o tags tags".  For Universal ctags and Exuberant ctags
        version 5.x or higher (at least 5.5) the --sort=foldcase switch can be
        used for this as well.  Note that case must be folded to uppercase for
        this to work.

        By default, tag searches are case-sensitive.  Case is ignored when
        'ignorecase' is set and 'tagcase' is "followic", or when 'tagcase' is
        "ignore".
        Also when 'tagcase' is "followscs" and 'smartcase' is set, or
        'tagcase' is "smart", and the pattern contains only lowercase
        characters.

        When 'tagbsearch' is off, tags searching is slower when a full match
        exists, but faster when no full match exists.  Tags in unsorted tags
        files may only be found with 'tagbsearch' off.
        When the tags file is not sorted, or sorted in a wrong way (not on
        ASCII byte value), 'tagbsearch' should be off, or the line given above
        must be included in the tags file.
        This option doesn't affect commands that find all matching tags (e.g.,
        command-line completion and ":help").

                                                        'tagcase' 'tc'
'tagcase' 'tc'          string  (default "followic")
                        global or local to buffer global-local
        This option specifies how case is handled when searching the tags
        file:
           followic     Follow the 'ignorecase' option
           followscs    Follow the 'smartcase' and 'ignorecase' options
           ignore       Ignore case
           match        Match case
           smart        Ignore case unless an upper case letter is used

                                                        'tagfunc' 'tfu'
'tagfunc' 'tfu'         string  (default: empty)
                        local to buffer
        This option specifies a function to be used to perform tag searches.
        The function gets the tag pattern and should return a List of matching
        tags.  See tag-function for an explanation of how to write the
        function and an example.

                                                'taglength' 'tl'
'taglength' 'tl'        number  (default 0)
                        global
        If non-zero, tags are significant up to this number of characters.

                        'tagrelative' 'tr' 'notagrelative' 'notr'
'tagrelative' 'tr'      boolean (default: on)
                        global
        If on and using a tags file in another directory, file names in that
        tags file are relative to the directory where the tags file is.

                                                'tags' 'tag' E433
'tags' 'tag'            string  (default "./tags;,tags")
                        global or local to buffer global-local
        Filenames for the tag command, separated by spaces or commas.  To
        include a space or comma in a file name, precede it with a backslash
        (see option-backslash about including spaces and backslashes).
        When a file name starts with "./", the '.' is replaced with the path
        of the current file.  But only when the 'd' flag is not included in
        'cpoptions'.  Environment variables are expanded :set_env.  Also see
        tags-option.
        "*", "**" and other wildcards can be used to search for tags files in
        a directory tree.  See file-searching.  E.g., "/lib/**/tags" will
        find all files named "tags" below "/lib".  The filename itself cannot
        contain wildcards, it is used as-is.  E.g., "/lib/**/tags?" will find
        files called "tags?".
        The tagfiles() function can be used to get a list of the file names
        actually used.
        The use of :set+= and :set-= is preferred when adding or removing
        file names from the list.  This avoids problems when a future version
        uses another default.

                                'tagstack' 'tgst' 'notagstack' 'notgst'
'tagstack' 'tgst'       boolean (default on)
                        global
        When on, the tagstack is used normally.  When off, a ":tag" or
        ":tselect" command with an argument will not push the tag onto the
        tagstack.  A following ":tag" without an argument, a ":pop" command or
        any other command that uses the tagstack will use the unmodified
        tagstack, but does change the pointer to the active entry.
        Resetting this option is useful when using a ":tag" command in a
        mapping which should not change the tagstack.

                                                'termbidi' 'tbidi'
                                                'notermbidi' 'notbidi'
'termbidi' 'tbidi'      boolean (default off)
                        global
        The terminal is in charge of Bi-directionality of text (as specified
        by Unicode).  The terminal is also expected to do the required shaping
        that some languages (such as Arabic) require.
        Setting this option implies that 'rightleft' will not be set when
        'arabic' is set and the value of 'arabicshape' will be ignored.
        Note that setting 'termbidi' has the immediate effect that
        'arabicshape' is ignored, but 'rightleft' isn't changed automatically.
        For further details see arabic.txt.

                        'termguicolors' 'tgc' 'notermguicolors' 'notgc'
'termguicolors' 'tgc'   boolean (default off)
                        global
        Enables 24-bit RGB color in the TUI.  Uses "gui" :highlight
        attributes instead of "cterm" attributes. guifg
        Requires an ISO-8613-3 compatible terminal.

                                                'termpastefilter' 'tpf'
'termpastefilter' 'tpf' string  (default: "BS,HT,ESC,DEL")
                        global
        A comma-separated list of options for specifying control characters
        to be removed from the text pasted into the terminal window. The
        supported values are:

           BS       Backspace

           HT       TAB

           FF       Form feed

           ESC      Escape

           DEL      DEL

           C0       Other control characters, excluding Line feed and
                    Carriage return < ' '

           C1       Control characters 0x80...0x9F


                                                'textwidth' 'tw'
'textwidth' 'tw'        number  (default 0)
                        local to buffer
        Maximum width of text that is being inserted.  A longer line will be
        broken after white space to get this width.  A zero value disables
        this.
        'textwidth' is set to 0 when the 'paste' option is set and restored
        when 'paste' is reset.
        When 'textwidth' is zero, 'wrapmargin' may be used.  See also
        'formatoptions' and ins-textwidth.
        When 'formatexpr' is set it will be used to break the line.

                                                'thesaurus' 'tsr'
'thesaurus' 'tsr'       string  (default "")
                        global or local to buffer global-local
        List of file names, separated by commas, that are used to lookup words
        for thesaurus completion commands i_CTRL-X_CTRL-T.  See
        compl-thesaurus.

        This option is not used if 'thesaurusfunc' is set, either for the
        buffer or globally.

        To include a comma in a file name precede it with a backslash.  Spaces
        after a comma are ignored, otherwise spaces are included in the file
        name.  See option-backslash about using backslashes.  The use of
        :set+= and :set-= is preferred when adding or removing directories
        from the list.  This avoids problems when a future version uses
        another default.  Backticks cannot be used in this option for security
        reasons.

                                                'thesaurusfunc' 'tsrfu'
'thesaurusfunc' 'tsrfu' string  (default: empty)
                        global or local to buffer global-local
        This option specifies a function to be used for thesaurus completion
        with CTRL-X CTRL-T. i_CTRL-X_CTRL-T See compl-thesaurusfunc.

        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                             'tildeop' 'top' 'notildeop' 'notop'
'tildeop' 'top'         boolean (default off)
                        global
        When on: The tilde command "~" behaves like an operator.

                                'timeout' 'to' 'notimeout' 'noto'
'timeout' 'to'          boolean (default on)
                        global
        This option and 'timeoutlen' determine the behavior when part of a
        mapped key sequence has been received. For example, if <c-f> is
        pressed and 'timeout' is set, Nvim will wait 'timeoutlen' milliseconds
        for any key that can follow <c-f> in a mapping.

                                                'ttimeout' 'nottimeout'
'ttimeout'              boolean (default on)
                        global
        This option and 'ttimeoutlen' determine the behavior when part of a
        key code sequence has been received by the TUI.

        For example if <Esc> (the \x1b byte) is received and 'ttimeout' is
        set, Nvim waits 'ttimeoutlen' milliseconds for the terminal to
        complete a key code sequence. If no input arrives before the timeout,
        a single <Esc> is assumed. Many TUI cursor key codes start with <Esc>.

        On very slow systems this may fail, causing cursor keys not to work
        sometimes.  If you discover this problem you can ":set ttimeoutlen=9999".
        Nvim will wait for the next character to arrive after an <Esc>.

                                                'timeoutlen' 'tm'
'timeoutlen' 'tm'       number  (default 1000)
                        global
        Time in milliseconds to wait for a mapped sequence to complete.

                                                'ttimeoutlen' 'ttm'
'ttimeoutlen' 'ttm'     number  (default 50)
                        global
        Time in milliseconds to wait for a key code sequence to complete. Also
        used for CTRL-\ CTRL-N and CTRL-\ CTRL-G when part of a command has
        been typed.

                                                'title' 'notitle'
'title'                 boolean (default off)
                        global
        When on, the title of the window will be set to the value of
        'titlestring' (if it is not empty), or to:
                filename [+=-] (path) - NVIM
        Where:
                filename        the name of the file being edited
                -               indicates the file cannot be modified, 'ma' off
                +               indicates the file was modified
                =               indicates the file is read-only
                =+              indicates the file is read-only and modified
                (path)          is the path of the file being edited
                - NVIM          the server name v:servername or "NVIM"

                                                                'titlelen'
'titlelen'              number  (default 85)
                        global
        Gives the percentage of 'columns' to use for the length of the window
        title.  When the title is longer, only the end of the path name is
        shown.  A '<' character before the path name is used to indicate this.
        Using a percentage makes this adapt to the width of the window.  But
        it won't work perfectly, because the actual number of characters
        available also depends on the font used and other things in the title
        bar.  When 'titlelen' is zero the full path is used.  Otherwise,
        values from 1 to 30000 percent can be used.
        'titlelen' is also used for the 'titlestring' option.

                                                'titleold'
'titleold'              string  (default "")
                        global
        If not empty, this option will be used to set the window title when
        exiting.  Only if 'title' is enabled.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.
                                                'titlestring'
'titlestring'           string  (default "")
                        global
        When this option is not empty, it will be used for the title of the
        window.  This happens only when the 'title' option is on.

        When this option contains printf-style '%' items, they will be
        expanded according to the rules used for 'statusline'.
        This option cannot be set in a modeline when 'modelineexpr' is off.

        Example: 
            :auto BufEnter * let &titlestring = hostname() .. "/" .. expand("%:p")
            :set title titlestring=%<%F%=%l/%L-%P titlelen=70
       The value of 'titlelen' is used to align items in the middle or right
        of the available space.
        Some people prefer to have the file name first: 
            :set titlestring=%t%(\ %M%)%(\ (%{expand(\"%:~:.:h\")})%)%(\ %a%)
       Note the use of "%{ }" and an expression to get the path of the file,
        without the file name.  The "%( %)" constructs are used to add a
        separating space only when needed.
        NOTE: Use of special characters in 'titlestring' may cause the display
        to be garbled (e.g., when it contains a CR or NL character).

                                                'undodir' 'udir' E5003
'undodir' 'udir'        string  (default "$XDG_STATE_HOME/nvim/undo//")
                        global
        List of directory names for undo files, separated with commas.
        See 'backupdir' for details of the format.
        "." means using the directory of the file.  The undo file name for
        "file.txt" is ".file.txt.un~".
        For other directories the file name is the full path of the edited
        file, with path separators replaced with "%".
        When writing: The first directory that exists is used.  "." always
        works, no directories after "." will be used for writing.  If none of
        the directories exist Nvim will attempt to create the last directory in
        the list.
        When reading all entries are tried to find an undo file.  The first
        undo file that exists is used.  When it cannot be read an error is
        given, no further entry is used.
        See undo-persistence.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

        Note that unlike 'directory' and 'backupdir', 'undodir' always acts as
        though the trailing slashes are present (see 'backupdir' for what this
        means).

                                'undofile' 'noundofile' 'udf' 'noudf'
'undofile' 'udf'        boolean (default off)
                        local to buffer
        When on, Vim automatically saves undo history to an undo file when
        writing a buffer to a file, and restores undo history from the same
        file on buffer read.
        The directory where the undo file is stored is specified by 'undodir'.
        For more information about this feature see undo-persistence.
        The undo file is not read when 'undoreload' causes the buffer from
        before a reload to be saved for undo.
        When 'undofile' is turned off the undo file is NOT deleted.

                                                'undolevels' 'ul'
'undolevels' 'ul'       number  (default 1000)
                        global or local to buffer global-local
        Maximum number of changes that can be undone.  Since undo information
        is kept in memory, higher numbers will cause more memory to be used.
        Nevertheless, a single change can already use a large amount of memory.
        Set to 0 for Vi compatibility: One level of undo and "u" undoes
        itself: 
                set ul=0
       But you can also get Vi compatibility by including the 'u' flag in
        'cpoptions', and still be able to use CTRL-R to repeat undo.
        Also see undo-two-ways.
        Set to -1 for no undo at all.  You might want to do this only for the
        current buffer: 
                setlocal ul=-1
       This helps when you run out of memory for a single change.

        The local value is set to -123456 when the global value is to be used.

        Also see clear-undo.

                                                'undoreload' 'ur'
'undoreload' 'ur'       number  (default 10000)
                        global
        Save the whole buffer for undo when reloading it.  This applies to the
        ":e!" command and reloading for when the buffer changed outside of
        Vim. FileChangedShell
        The save only happens when this option is negative or when the number
        of lines is smaller than the value of this option.
        Set this option to zero to disable undo for a reload.

        When saving undo for a reload, any undo file is not read.

        Note that this causes the whole buffer to be stored in memory.  Set
        this option to a lower value if you run out of memory.

                                                'updatecount' 'uc'
'updatecount' 'uc'      number  (default: 200)
                        global
        After typing this many characters the swap file will be written to
        disk.  When zero, no swap file will be created at all (see chapter on
        recovery crash-recovery).  'updatecount' is set to zero by starting
        Vim with the "-n" option, see startup.  When editing in readonly
        mode this option will be initialized to 10000.
        The swapfile can be disabled per buffer with 'swapfile'.
        When 'updatecount' is set from zero to non-zero, swap files are
        created for all buffers that have 'swapfile' set.  When 'updatecount'
        is set to zero, existing swap files are not deleted.
        This option has no meaning in buffers where 'buftype' is "nofile"
        or "nowrite".

                                                'updatetime' 'ut'
'updatetime' 'ut'       number  (default 4000)
                        global
        If this many milliseconds nothing is typed the swap file will be
        written to disk (see crash-recovery).  Also used for the
        CursorHold autocommand event.

                                        'varsofttabstop' 'vsts'
'varsofttabstop' 'vsts' string  (default "")
                        local to buffer
        A list of the number of spaces that a <Tab> counts for while editing,
        such as inserting a <Tab> or using <BS>.  It "feels" like variable-
        width <Tab>s are being inserted, while in fact a mixture of spaces
        and <Tab>s is used.  Tab widths are separated with commas, with the
        final value applying to all subsequent tabs.

        For example, when editing assembly language files where statements
        start in the 9th column and comments in the 41st, it may be useful
        to use the following: 
                :set varsofttabstop=8,32,8
       This will set soft tabstops with 8 and 8 + 32 spaces, and 8 more
        for every column thereafter.

        Note that the value of 'softtabstop' will be ignored while
        'varsofttabstop' is set.

                                                'vartabstop' 'vts'
'vartabstop' 'vts'      string  (default "")
                        local to buffer
        A list of the number of spaces that a <Tab> in the file counts for,
        separated by commas.  Each value corresponds to one tab, with the
        final value applying to all subsequent tabs. For example: 
                :set vartabstop=4,20,10,8
       This will make the first tab 4 spaces wide, the second 20 spaces,
        the third 10 spaces, and all following tabs 8 spaces.

        Note that the value of 'tabstop' will be ignored while 'vartabstop'
        is set.

                                                'verbose' 'vbs'
'verbose' 'vbs'         number  (default 0)
                        global
        Sets the verbosity level.  Also set by -V and :verbose.

        Tracing of options in Lua scripts is activated at level 1; Lua scripts
        are not traced with verbose=0, for performance.

        If greater than or equal to a given level, Nvim produces the following
        messages:

        Level   Messages 
        ----------------------------------------------------------------------
        1       Lua assignments to options, mappings, etc.
        2       When a file is ":source"'ed, or shada file is read or written.
        3       UI info, terminal capabilities.
        4       Shell commands.
        5       Every searched tags file and include file.
        8       Files for which a group of autocommands is executed.
        9       Executed autocommands.
        11      Finding items in a path.
        12      Vimscript function calls.
        13      When an exception is thrown, caught, finished, or discarded.
        14      Anything pending in a ":finally" clause.
        15      Ex commands from a script (truncated at 200 characters).
        16      Ex commands.

        If 'verbosefile' is set then the verbose messages are not displayed.

                                                'verbosefile' 'vfile'
'verbosefile' 'vfile'   string  (default empty)
                        global
        When not empty all messages are written in a file with this name.
        When the file exists messages are appended.
        Writing to the file ends when Vim exits or when 'verbosefile' is made
        empty.  Writes are buffered, thus may not show up for some time.
        Setting 'verbosefile' to a new value is like making it empty first.
        The difference with :redir is that verbose messages are not
        displayed when 'verbosefile' is set.

                                                'viewdir' 'vdir'
'viewdir' 'vdir'        string  (default: "$XDG_STATE_HOME/nvim/view//")
                        global
        Name of the directory where to store files for :mkview.
        This option cannot be set from a modeline or in the sandbox, for
        security reasons.

                                                'viewoptions' 'vop'
'viewoptions' 'vop'     string  (default: "folds,cursor,curdir")
                        global
        Changes the effect of the :mkview command.  It is a comma-separated
        list of words.  Each word enables saving and restoring something:
           word         save and restore 
           cursor       cursor position in file and in window
           curdir       local current directory, if set with :lcd
           folds        manually created folds, opened/closed folds and local
                        fold options
           options      options and mappings local to a window or buffer (not
                        global values for local options)
           localoptions same as "options"
           slash        deprecated Always enabled. Uses "/" in filenames.
           unix         deprecated Always enabled. Uses "\n" line endings.

                                            'virtualedit' 've'
'virtualedit' 've'      string  (default "")
                        global or local to window global-local
        A comma-separated list of these words:
            block       Allow virtual editing in Visual block mode.
            insert      Allow virtual editing in Insert mode.
            all         Allow virtual editing in all modes.
            onemore     Allow the cursor to move just past the end of the line
            none        When used as the local value, do not allow virtual
                        editing even when the global value is set.  When used
                        as the global value, "none" is the same as "".
            NONE        Alternative spelling of "none".

        Virtual editing means that the cursor can be positioned where there is
        no actual character.  This can be halfway into a tab or beyond the end
        of the line.  Useful for selecting a rectangle in Visual mode and
        editing a table.
        "onemore" is not the same, it will only allow moving the cursor just
        after the last character of the line.  This makes some commands more
        consistent.  Previously the cursor was always past the end of the line
        if the line was empty.  But it is far from Vi compatible.  It may also
        break some plugins or Vim scripts.  For example because l can move
        the cursor after the last character.  Use with care!
        Using the $ command will move to the last character in the line, not
        past it.  This may actually move the cursor to the left!
        The g$ command will move to the end of the screen line.
        It doesn't make sense to combine "all" with "onemore", but you will
        not get a warning for it.
        When combined with other words, "none" is ignored.

                        'visualbell' 'vb' 'novisualbell' 'novb' beep
'visualbell' 'vb'       boolean (default off)
                        global
        Use visual bell instead of beeping.  Also see 'errorbells'.

                                                'warn' 'nowarn'
'warn'                  boolean (default on)
                        global
        Give a warning message when a shell command is used while the buffer
        has been changed.

                                                'whichwrap' 'ww'
'whichwrap' 'ww'        string  (default: "b,s")
                        global
        Allow specified keys that move the cursor left/right to move to the
        previous/next line when the cursor is on the first/last character in
        the line.  Concatenate characters to allow this for these keys:
                char   key        mode  
                 b    <BS>       Normal and Visual
                 s    <Space>    Normal and Visual
                 h    "h"        Normal and Visual (not recommended)
                 l    "l"        Normal and Visual (not recommended)
                 <    <Left>     Normal and Visual
                 >    <Right>    Normal and Visual
                 ~    "~"        Normal
                 [    <Left>     Insert and Replace
                 ]    <Right>    Insert and Replace
        For example: 
                :set ww=<,>,[,]
       allows wrap only when cursor keys are used.
        When the movement keys are used in combination with a delete or change
        operator, the <EOL> also counts for a character.  This makes "3h"
        different from "3dh" when the cursor crosses the end of a line.  This
        is also true for "x" and "X", because they do the same as "dl" and
        "dh".  If you use this, you may also want to use the mapping
        ":map <BS> X" to make backspace delete the character in front of the
        cursor.
        When 'l' is included and it is used after an operator at the end of a
        line (not an empty line) then it will not move to the next line.  This
        makes "dl", "cl", "yl" etc. work normally.

                                                'wildchar' 'wc'
'wildchar' 'wc'         number  (default: <Tab>)
                        global
        Character you have to type to start wildcard expansion in the
        command-line, as specified with 'wildmode'.
        More info here: cmdline-completion.
        The character is not recognized when used inside a macro.  See
        'wildcharm' for that.
        Some keys will not work, such as CTRL-C, <CR> and Enter.
        Although 'wc' is a number option, you can set it to a special key: 
                :set wc=<Tab>


                                                'wildcharm' 'wcm'
'wildcharm' 'wcm'       number  (default: none (0))
                        global
        'wildcharm' works exactly like 'wildchar', except that it is
        recognized when used inside a macro.  You can find "spare" command-line
        keys suitable for this option by looking at ex-edit-index.  Normally
        you'll never actually type 'wildcharm', just use it in mappings that
        automatically invoke completion mode, e.g.: 
                :set wcm=<C-Z>
                :cnoremap ss so $vim/sessions/*.vim<C-Z>
       Then after typing :ss you can use CTRL-P & CTRL-N.

                                                'wildignore' 'wig'
'wildignore' 'wig'      string  (default "")
                        global
        A list of file patterns.  A file that matches with one of these
        patterns is ignored when expanding wildcards, completing file or
        directory names, and influences the result of expand(), glob() and
        globpath() unless a flag is passed to disable this.
        The pattern is used like with :autocmd, see autocmd-pattern.
        Also see 'suffixes'.
        Example: 
                :set wildignore=*.o,*.obj
       The use of :set+= and :set-= is preferred when adding or removing
        a pattern from the list.  This avoids problems when a future version
        uses another default.


                        'wildignorecase' 'wic' 'nowildignorecase' 'nowic'
'wildignorecase' 'wic'  boolean (default off)
                        global
        When set case is ignored when completing file names and directories.
        Has no effect when 'fileignorecase' is set.
        Does not apply when the shell is used to expand wildcards, which
        happens when there are special characters.


                                'wildmenu' 'wmnu' 'nowildmenu' 'nowmnu'
'wildmenu' 'wmnu'       boolean (default on)
                        global
        When 'wildmenu' is on, command-line completion operates in an enhanced
        mode.  On pressing 'wildchar' (usually <Tab>) to invoke completion,
        the possible matches are shown.
        When 'wildoptions' contains "pum", then the completion matches are
        shown in a popup menu.  Otherwise they are displayed just above the
        command line, with the first match highlighted (overwriting the status
        line, if there is one).
        Keys that show the previous/next match, such as <Tab> or
        CTRL-P/CTRL-N, cause the highlight to move to the appropriate match.
        'wildmode' must specify "full": "longest" and "list" do not start
        'wildmenu' mode. You can check the current mode with wildmenumode().
        The menu is cancelled when a key is hit that is not used for selecting
        a completion.

        While the menu is active these keys have special meanings:

        CTRL-Y          - accept the currently selected match and stop
                          completion.
        CTRL-E          - end completion, go back to what was there before
                          selecting a match.
        <Left> <Right>  - select previous/next match (like CTRL-P/CTRL-N)
        <Down>          - in filename/menu name completion: move into a
                          subdirectory or submenu.
        <CR>            - in menu completion, when the cursor is just after a
                          dot: move into a submenu.
        <Up>            - in filename/menu name completion: move up into
                          parent directory or parent menu.

        If you want <Left> and <Right> to move the cursor instead of selecting
        a different match, use this: 
                :cnoremap <Left> <Space><BS><Left>
                :cnoremap <Right> <Space><BS><Right>

        hl-WildMenu highlights the current match.

                                                'wildmode' 'wim'
'wildmode' 'wim'        string  (default: "full")
                        global
        Completion mode that is used for the character specified with
        'wildchar'.  It is a comma-separated list of up to four parts.  Each
        part specifies what to do for each consecutive use of 'wildchar'.  The
        first part specifies the behavior for the first use of 'wildchar',
        The second part for the second use, etc.

        Each part consists of a colon separated list consisting of the
        following possible values:
        ""              Complete only the first match.
        "full"          Complete the next full match.  After the last match,
                        the original string is used and then the first match
                        again.  Will also start 'wildmenu' if it is enabled.
        "longest"       Complete till longest common string.  If this doesn't
                        result in a longer string, use the next part.
        "list"          When more than one match, list all matches.
        "lastused"      When completing buffer names and more than one buffer
                        matches, sort buffers by time last used (other than
                        the current buffer).
        When there is only a single match, it is fully completed in all cases.

        Examples of useful colon-separated values:
        "longest:full"  Like "longest", but also start 'wildmenu' if it is
                        enabled.  Will not complete to the next full match.
        "list:full"     When more than one match, list all matches and
                        complete first match.
        "list:longest"  When more than one match, list all matches and
                        complete till longest common string.
        "list:lastused" When more than one buffer matches, list all matches
                        and sort buffers by time last used (other than the
                        current buffer).

        Examples: 
                :set wildmode=full
       Complete first full match, next match, etc.  (the default) 
                :set wildmode=longest,full
       Complete longest common string, then each full match 
                :set wildmode=list:full
       List all matches and complete each full match 
                :set wildmode=list,full
       List all matches without completing, then each full match 
                :set wildmode=longest,list
       Complete longest common string, then list alternatives.
        More info here: cmdline-completion.

                                                'wildoptions' 'wop'
'wildoptions' 'wop'     string  (default "pum,tagfile")
                        global
        A list of words that change how cmdline-completion is done.
        The following values are supported:
          pum           Display the completion matches using the popup menu
                        in the same style as the ins-completion-menu.
          tagfile       When using CTRL-D to list matching tags, the kind of
                        tag and the file of the tag is listed.  Only one match
                        is displayed per line.  Often used tag kinds are:
                                d       #define
                                f       function

                                                'winaltkeys' 'wak'
'winaltkeys' 'wak'      string  (default "menu")
                        global
                        {only used in Win32}
        Some GUI versions allow the access to menu entries by using the ALT
        key in combination with a character that appears underlined in the
        menu.  This conflicts with the use of the ALT key for mappings and
        entering special characters.  This option tells what to do:
          no    Don't use ALT keys for menus.  ALT key combinations can be
                mapped, but there is no automatic handling.
          yes   ALT key handling is done by the windowing system.  ALT key
                combinations cannot be mapped.
          menu  Using ALT in combination with a character that is a menu
                shortcut key, will be handled by the windowing system.  Other
                keys can be mapped.
        If the menu is disabled by excluding 'm' from 'guioptions', the ALT
        key is never used for the menu.
        This option is not used for <F10>; on Win32.

                                                'winbar' 'wbr'
'winbar' 'wbr'          string (default empty)
                        global or local to window global-local
        When non-empty, this option enables the window bar and determines its
        contents. The window bar is a bar that's shown at the top of every
        window with it enabled. The value of 'winbar' is evaluated like with
        'statusline'.

        When changing something that is used in 'winbar' that does not trigger
        it to be updated, use :redrawstatus.

        Floating windows do not use the global value of 'winbar'. The
        window-local value of 'winbar' must be set for a floating window to
        have a window bar.

        This option cannot be set in a modeline when 'modelineexpr' is off.

                                                'winblend' 'winbl'
'winblend' 'winbl'              number  (default 0)
                        local to window
        Enables pseudo-transparency for a floating window. Valid values are in
        the range of 0 for fully opaque window (disabled) to 100 for fully
        transparent background. Values between 0-30 are typically most useful.

        UI-dependent. Works best with RGB colors. 'termguicolors'

                                                'window' 'wi'
'window' 'wi'           number  (default screen height - 1)
                        global
        Window height used for CTRL-F and CTRL-B when there is only one
        window and the value is smaller than 'lines' minus one.  The screen
        will scroll 'window' minus two lines, with a minimum of one.
        When 'window' is equal to 'lines' minus one CTRL-F and CTRL-B scroll
        in a much smarter way, taking care of wrapping lines.
        When resizing the Vim window, the value is smaller than 1 or more than
        or equal to 'lines' it will be set to 'lines' minus 1.
        Note: Do not confuse this with the height of the Vim window, use
        'lines' for that.

                                                'winheight' 'wh' E591
'winheight' 'wh'        number  (default 1)
                        global
        Minimal number of lines for the current window.  This is not a hard
        minimum, Vim will use fewer lines if there is not enough room.  If the
        focus goes to a window that is smaller, its size is increased, at the
        cost of the height of other windows.
        Set 'winheight' to a small number for normal editing.
        Set it to 999 to make the current window fill most of the screen.
        Other windows will be only 'winminheight' high.  This has the drawback
        that ":all" will create only two windows.  To avoid "vim -o 1 2 3 4"
        to create only two windows, set the option after startup is done,
        using the VimEnter event: 
                au VimEnter * set winheight=999
       Minimum value is 1.
        The height is not adjusted after one of the commands that change the
        height of the current window.
        'winheight' applies to the current window.  Use 'winminheight' to set
        the minimal height for other windows.

                                                'winhighlight' 'winhl'
'winhighlight' 'winhl'  string (default empty)
                        local to window
        Window-local highlights.  Comma-delimited list of highlight
        group-name pairs "{hl-from}:{hl-to},..." where each {hl-from} is
        a highlight-groups item to be overridden by {hl-to} group in
        the window.

        Note: highlight namespaces take precedence over 'winhighlight'.
        See nvim_win_set_hl_ns() and nvim_set_hl().

        Highlights of vertical separators are determined by the window to the
        left of the separator.  The 'tabline' highlight of a tabpage is
        decided by the last-focused window of the tabpage.  Highlights of
        the popupmenu are determined by the current window.  Highlights in the
        message area cannot be overridden.

        Example: show a different color for non-current windows: 
                set winhighlight=Normal:MyNormal,NormalNC:MyNormalNC

                        'winfixheight' 'wfh' 'nowinfixheight' 'nowfh'
'winfixheight' 'wfh'    boolean (default off)
                        local to window
        Keep the window height when windows are opened or closed and
        'equalalways' is set.  Also for CTRL-W_=.  Set by default for the
        preview-window and quickfix-window.
        The height may be changed anyway when running out of room.

                        'winfixwidth' 'wfw' 'nowinfixwidth' 'nowfw'
'winfixwidth' 'wfw'     boolean (default off)
                        local to window
        Keep the window width when windows are opened or closed and
        'equalalways' is set.  Also for CTRL-W_=.
        The width may be changed anyway when running out of room.

                                                'winminheight' 'wmh'
'winminheight' 'wmh'    number  (default 1)
                        global
        The minimal height of a window, when it's not the current window.
        This is a hard minimum, windows will never become smaller.
        When set to zero, windows may be "squashed" to zero lines (i.e. just a
        status bar) if necessary.  They will return to at least one line when
        they become active (since the cursor has to have somewhere to go.)
        Use 'winheight' to set the minimal height of the current window.
        This option is only checked when making a window smaller.  Don't use a
        large number, it will cause errors when opening more than a few
        windows.  A value of 0 to 3 is reasonable.

                                                'winminwidth' 'wmw'
'winminwidth' 'wmw'     number  (default 1)
                        global
        The minimal width of a window, when it's not the current window.
        This is a hard minimum, windows will never become smaller.
        When set to zero, windows may be "squashed" to zero columns (i.e. just
        a vertical separator) if necessary.  They will return to at least one
        line when they become active (since the cursor has to have somewhere
        to go.)
        Use 'winwidth' to set the minimal width of the current window.
        This option is only checked when making a window smaller.  Don't use a
        large number, it will cause errors when opening more than a few
        windows.  A value of 0 to 12 is reasonable.

                                                'winwidth' 'wiw' E592
'winwidth' 'wiw'        number  (default 20)
                        global
        Minimal number of columns for the current window.  This is not a hard
        minimum, Vim will use fewer columns if there is not enough room.  If
        the current window is smaller, its size is increased, at the cost of
        the width of other windows.  Set it to 999 to make the current window
        always fill the screen.  Set it to a small number for normal editing.
        The width is not adjusted after one of the commands to change the
        width of the current window.
        'winwidth' applies to the current window.  Use 'winminwidth' to set
        the minimal width for other windows.

                                                'wrap' 'nowrap'
'wrap'                  boolean (default on)
                        local to window
        This option changes how text is displayed.  It doesn't change the text
        in the buffer, see 'textwidth' for that.
        When on, lines longer than the width of the window will wrap and
        displaying continues on the next line.  When off lines will not wrap
        and only part of long lines will be displayed.  When the cursor is
        moved to a part that is not shown, the screen will scroll
        horizontally.
        The line will be broken in the middle of a word if necessary.  See
        'linebreak' to get the break at a word boundary.
        To make scrolling horizontally a bit more useful, try this: 
                :set sidescroll=5
                :set listchars+=precedes:<,extends:>
       See 'sidescroll', 'listchars' and wrap-off.
        This option can't be set from a modeline when the 'diff' option is
        on.

                                                'wrapmargin' 'wm'
'wrapmargin' 'wm'       number  (default 0)
                        local to buffer
        Number of characters from the right window border where wrapping
        starts.  When typing text beyond this limit, an <EOL> will be inserted
        and inserting continues on the next line.
        Options that add a margin, such as 'number' and 'foldcolumn', cause
        the text width to be further reduced.
        When 'textwidth' is non-zero, this option is not used.
        See also 'formatoptions' and ins-textwidth.

                                   'wrapscan' 'ws' 'nowrapscan' 'nows'
'wrapscan' 'ws'         boolean (default on)                    E384 E385
                        global
        Searches wrap around the end of the file.  Also applies to ]s and
        [s, searching for spelling mistakes.

                                                   'write' 'nowrite'
'write'                 boolean (default on)
                        global
        Allows writing files.  When not set, writing a file is not allowed.
        Can be used for a view-only mode, where modifications to the text are
        still allowed.  Can be reset with the -m or -M command line
        argument.  Filtering text is still possible, even though this requires
        writing a temporary file.

                                   'writeany' 'wa' 'nowriteany' 'nowa'
'writeany' 'wa'         boolean (default off)
                        global
        Allows writing to any file with no need for "!" override.

                             'writebackup' 'wb' 'nowritebackup' 'nowb'
'writebackup' 'wb'      boolean (default on)
                        global
        Make a backup before overwriting a file.  The backup is removed after
        the file was successfully written, unless the 'backup' option is
        also on.
        WARNING: Switching this option off means that when Vim fails to write
        your buffer correctly and then, for whatever reason, Vim exits, you
        lose both the original file and what you were writing.  Only reset
        this option if your file system is almost full and it makes the write
        fail (and make sure not to exit Vim until the write was successful).
        See backup-table for another explanation.
        When the 'backupskip' pattern matches, a backup is not made anyway.
        Depending on 'backupcopy' the backup is a new file or the original
        file renamed (and a new file is written).

                                                'writedelay' 'wd'
'writedelay' 'wd'       number  (default 0)
                        global
        The number of milliseconds to wait for each character sent to the
        screen.  When positive, characters are sent to the UI one by one.
        See 'redrawdebug' for more options.  For debugging purposes.

 vim:tw=78:ts=8:noet:ft=help:norl:


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