commit https://github.com/vim/vim/commit/baec5c1768098f9dd867b465aaabfdfb294f10c2 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Apr 6 23:06:23 2016 +0200 patch 7.4.1716 Problem: 'autochdir' doesn't work for the first file. (Rob Hoelz) Solution: Call DO_AUTOCHDIR after startup. (Christian Brabandt, closes https://github.com/vim/vim/issues/704)

" Vim indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2009 Jun 03

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

" What works best is auto-indenting, disable other indenting.
" For formatting see the ftplugin.
setlocal autoindent nosmartindent nocindent indentexpr=