/usr/share/vim/vim80/ftplugin/initex.vim is in vim-runtime 2:8.0.1453-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | " filetype plugin for TeX and variants
" Language: TeX (ft=initex)
" Maintainer: Benji Fisher, Ph.D. <benji@member.AMS.org>
" Version: 1.0
" Last Change: Wed 19 Apr 2006
" Only do this when not done yet for this buffer.
if exists("b:did_ftplugin")
finish
endif
" Don't load another plugin for this buffer.
let b:did_ftplugin = 1
" Avoid problems if running in 'compatible' mode.
let s:save_cpo = &cpo
set cpo&vim
let b:undo_ftplugin = "setl com< cms< define< include< sua<"
" Set 'comments' to format dashed lists in comments
setlocal com=sO:%\ -,mO:%\ \ ,eO:%%,:%
" Set 'commentstring' to recognize the % comment character:
" (Thanks to Ajit Thakkar.)
setlocal cms=%%s
" Allow "[d" to be used to find a macro definition:
let &l:define='\\\([egx]\|char\|mathchar\|count\|dimen\|muskip\|skip\|toks\)\='
\ . 'def\|\\font\|\\\(future\)\=let'
" Tell Vim to recognize \input bar :
let &l:include = '\\input'
setlocal suffixesadd=.tex
let &cpo = s:save_cpo
unlet s:save_cpo
" vim:sts=2:sw=2:
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