patch 8.1.1627: header file contains mixed comment style commit https://github.com/vim/vim/commit/6cb39f924a10912a615573230e906e8089975198 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jul 4 16:05:14 2019 +0200 patch 8.1.1627: header file contains mixed comment style Problem: Header file contains mixed comment style. Solution: Use // style comments.

" 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$*\ \"%:p\"\ -o\ \"%:p:r.$*\"