patch 8.2.4256: MS-Windows: compiler warnings when compiled with /W4 Commit: https://github.com/vim/vim/commit/135e15251efd96c960e51e8ab31333c2d6887983 Author: K.Takata <kentkt@csc.jp> Date: Sat Jan 29 15:27:58 2022 +0000 patch 8.2.4256: MS-Windows: compiler warnings when compiled with /W4 Problem: MS-Windows: compiler warnings when compiled with /W4. Solution: Small adjustments to the code. (Ken Takata, closes https://github.com/vim/vim/issues/9659)

" Vim indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2021 Sep 26

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=

let b:undo_indent = "setl ai< cin< inde< si<"