commit https://github.com/vim/vim/commit/386600f0cbcb8add099c723cf84634f46df2f788 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Aug 15 22:16:25 2016 +0200 patch 7.4.2215 Problem: It's not easy to find out if a window is a quickfix or location list window. Solution: Add "loclist" and "quickfix" entries to the dict returnec by getwininfo(). (Yegappan Lakshmanan)

" Vim filetype plugin file
" Language:	Diff
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2005 Jul 27

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let b:undo_ftplugin = "setl modeline<"

" Don't use modelines in a diff, they apply to the diffed file
setlocal nomodeline