patch 8.1.0188: no test for ":cscope add" commit https://github.com/vim/vim/commit/2196bca7377ff245866cc3cee65b0adb48432ac3 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jul 15 17:36:32 2018 +0200 patch 8.1.0188: no test for ":cscope add" Problem: No test for ":cscope add". Solution: Add a test. (Dominique Pelle, closes https://github.com/vim/vim/issues/3212)

" Simplistic way to make spaces and Tabs visible

" This can be added to an already active syntax.

syn match Space " "
syn match Tab "\t"
if &background == "dark"
  hi def Space ctermbg=darkred guibg=#500000
  hi def Tab ctermbg=darkgreen guibg=#003000
else
  hi def Space ctermbg=lightred guibg=#ffd0d0
  hi def Tab ctermbg=lightgreen guibg=#d0ffd0
endif