patch 8.0.0341: undo does not work properly when using completion commit https://github.com/vim/vim/commit/d56a79d3396cf70861b7f739a3c400db91ce7b70 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 19 15:26:18 2017 +0100 patch 8.0.0341: undo does not work properly when using completion Problem: When using complete() and typing a character undo is saved after the character was inserted. (Shougo) Solution: Save for undo before inserting the character.

" Vim compiler file
" Compiler:     ATT dot
" Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
" Last Change:	2004 May 16

if exists("current_compiler")
  finish
endif
let current_compiler = "dot"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

CompilerSet makeprg=dot\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"