patch 8.1.0513: no error for set diffopt+=algorithm: commit https://github.com/vim/vim/commit/d0721058f494143186f66a60151c9634031a8c96 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 5 21:21:33 2018 +0100 patch 8.1.0513: no error for set diffopt+=algorithm: Problem: No error for set diffopt+=algorithm:. Solution: Check for missing argument. (Hirohito Higashi, closes https://github.com/vim/vim/issues/3598)

" 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=