commit https://github.com/vim/vim/commit/c6aa475a27e3ed1645446b014c32ebf68d005d49 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 7 15:39:43 2017 +0100 patch 8.0.0148: wrong indent in C preprocessor with line continuation Problem: When a C preprocessor statement has two line continuations the following line does not have the right indent. (Ken Takata) Solution: Add the indent of the previous continuation line. (Hirohito Higashi)

" 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