commit https://github.com/vim/vim/commit/1610d052413e0ed664498853a47acc2d677a22d1 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 9 22:53:01 2016 +0200 patch 7.4.1913 Problem: When ":doautocmd" is used modelines are used even when no autocommands were executed. (Daniel Hahler) Solution: Skip processing modelines. (closes https://github.com/vim/vim/issues/854)

" Vim support file to switch off loading plugins for file types
"
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2011 Oct 20

if exists("did_load_ftplugin")
  unlet did_load_ftplugin
endif

" Remove all autocommands in the filetypeplugin group, if any exist.
if exists("#filetypeplugin")
  silent! au! filetypeplugin *
endif