patch 8.0.1153: no tests for diff_hlID() and diff_filler() commit https://github.com/vim/vim/commit/97fbc404fc56f76df12b2d2658b1d6efda28d5dd Author: Bram Moolenaar <Bram@vim.org> Date: Tue Sep 26 19:41:46 2017 +0200 patch 8.0.1153: no tests for diff_hlID() and diff_filler() Problem: No tests for diff_hlID() and diff_filler(). Solution: Add tests. (Dominique Pelle, closes https://github.com/vim/vim/issues/2156)

" Vim syntax file
" Language:  systemd.unit(5)

if !exists('b:current_syntax')
  " Looks a lot like dosini files.
  runtime! syntax/dosini.vim
  let b:current_syntax = 'systemd'
endif