for |g@| operator
'packpath'	  'pp'      list of directories used for packages
'paragraphs'	  'para'    nroff macros that separate paragraphs
'patchexpr'	  'pex'     expression used to patch a file
'patchmode'	  'pm'	    keep the oldest version of a file
'path'		  'pa'	    list of directories searched with "gf" et.al.
'preserveindent'  'pi'	    preserve the indent structure when reindenting
'previewheight'   'pvh'     height of the preview window
'previewwindow'   'pvw'     identifies the preview window
'pumheight'	  'ph'	    maximum number of items to show in the popup menu
'pumwidth'	  'pw'	    minimum width of the popup menu
'pyxversion'	  'pyx'	    Python version used for pyx* commands
'quoteescape'	  'qe'	    escape characters used in a string
'readonly'	  'ro'	    disallow writing the buffer
'redrawtime'	  'rdt'     timeout for 'hlsearch' and |:match| highlighting
'regexpengine'	  're'	    default regexp engine to use
'relativenumber'  'rnu'	    show relative line number in front of each line
'report'		    threshold for reporting nr. of lines changed
'revins'	  'ri'	    inserting characters will work backwards
'rightleft'	  'rl'	    window is right-to-left oriented
'rightleftcmd'	  'rlc'     commands for which editing works right-to-left
'ruler'		  'ru'	    show cursor line and column in the status line
'rulerformat'	  'ruf'     custom format for the ruler
'runtimepath'	  'rtp'     list of directories used for runtime files
'scroll'	  'scr'     lines to scroll with CTRL-U and CTRL-D
'scrollbind'	  'scb'     scroll in window as other windows scroll
'scrolljump'	  'sj'	    minimum number of lines to scroll
'scrolloff'	  'so'	    minimum nr. of lines above and below cursor
'scrollopt'	  'sbo'     how 'scrollbind' should behave
'sections'	  'sect'    nroff macros that separate sections
'secure'		    secure mode for reading .vimrc in current dir
'selection'	  'sel'     what type of selection to use
'selectmode'	  'slm'     when to use Select mode instead of Visual mode
'sessionoptions'  'ssop'    options for |:mksession|
'shada'		  'sd'	    use |shada| file upon startup and exiting
'shell'		  'sh'	    name of shell to use for external commands
'shellcmdflag'	  'shcf'    flag to shell to execute one command
'shellpipe'	  'sp'	    string to put output of ":make" in error file
'shellquote'	  'shq'     quote character(s) for around shell command
'shellredir'	  'srr'     string to put output of filter in a temp file
'shellslash'	  'ssl'     use forward slash for shell file names
'shelltemp'	  'stmp'    whether to use a temp file for shell commands
'shellxescape'	  'sxe'     characters to escape when 'shellxquote' is (
'shellxquote'	  'sxq'     like 'shellquote', but include redirection
'shiftround'	  'sr'	    round indent to multiple of shiftwidth
'shiftwidth'	  'sw'	    number of spaces to use for (auto)indent step
'shortmess'	  'shm'     list of flags, reduce length of messages
'showbreak'	  'sbr'     string to use at the start of wrapped lines
'showcmd'	  'sc'	    show (partial) command somewhere
'showcmdloc'	  'sloc'    where to show (partial) command
'showfulltag'	  'sft'     show full tag pattern when completing tag
'showmatch'	  'sm'	    briefly jump to matching bracket if insert one
'showmode'	  'smd'     message on status line to show current mode
'showtabline'	  'stal'    tells when the tab pages line is displayed
'sidescroll'	  'ss'	    minimum number of columns to scroll horizontal
'sidescrolloff'   'siso'    min. nr. of columns to left and right of cursor
'signcolumn'	  'scl'	    when and how to display the sign column
'smartcase'	  'scs'     no ignore case when pattern has uppercase
'smartindent'	  'si'	    smart autoindenting for C programs
'smarttab'	  'sta'     <Tab> in leading whitespace indents by 'shiftwidth'
'smoothscroll'	  'sms'     scroll by screen lines when 'wrap' is set
'softtabstop'	  'sts'     number of spaces that <Tab> uses while editing
'spell'			    enable spell checking
'spellcapcheck'   'spc'