commit https://github.com/vim/vim/commit/450ca4335e467ac29c1560b7397225a974aee3bf Author: Bram Moolenaar <Bram@vim.org> Date: Tue Nov 10 13:30:39 2015 +0100 patch 7.4.911 Problem: t_Ce and t_Cs are documented but not supported. (Hirohito Higashi) Solution: Define the options.

" Vim filetype plugin file
" Language:	C++
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2001 Jan 15

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

" Behaves just like C
runtime! ftplugin/c.vim ftplugin/c_*.vim ftplugin/c/*.vim