neovim/runtime/ftplugin/help.vim

" Vim filetype plugin file
" Language:             Vim help file
" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
" Latest Revision:      2018-12-29

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

let b:undo_ftplugin = "setl fo< tw< cole< cocu< keywordprg<"

setlocal formatoptions+=tcroql textwidth=78
if has("conceal")
  setlocal cole=2 cocu=nc
endif

" Prefer Vim help instead of manpages.
setlocal keywordprg=:help

let &cpo = s:cpo_save
unlet s:cpo_save