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 indent file
" Language:         dict(1) configuration file
" Maintainer:       Nikolai Weibull <now@bitwi.se>
" Latest Revision:  2006-12-20

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

setlocal indentkeys=0{,0},!^F,o,O cinwords= autoindent smartindent
setlocal nosmartindent
inoremap <buffer> # X#