patch 8.1.0506: modeline test fails when run by root commit https://github.com/vim/vim/commit/9691f82f862ed18c2e3e48f9d2cd902bb947f803 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 3 19:06:25 2018 +0100 patch 8.1.0506: modeline test fails when run by root Problem: Modeline test fails when run by root. Solution: Set 'modeline' for the test. (James McCoy, closes https://github.com/vim/vim/issues/3592)

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