/usr/share/vim/vim80/compiler/xmllint.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 | " Vim compiler file
" Compiler: xmllint
" Maintainer: Doug Kearns <dougkearns@gmail.com>
" Last Change: 2013 Jul 8
if exists("current_compiler")
finish
endif
let current_compiler = "xmllint"
if exists(":CompilerSet") != 2 " older Vim always used :setlocal
command -nargs=* CompilerSet setlocal <args>
endif
let s:cpo_save = &cpo
set cpo-=C
CompilerSet makeprg=xmllint\ --valid\ --noout
CompilerSet errorformat=%+E%f:%l:\ %.%#\ error\ :\ %m,
\%+W%f:%l:\ %.%#\ warning\ :\ %m,
\%-Z%p^,
\%-G%.%#
let &cpo = s:cpo_save
unlet s:cpo_save
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