/usr/share/vim/vim80/indent/mail.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 | " Vim indent file
" Language: Mail
" Maintainer: Bram Moolenaar
" Last Change: 2009 Jun 03
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
" What works best is auto-indenting, disable other indenting.
" For formatting see the ftplugin.
setlocal autoindent nosmartindent nocindent indentexpr=
|