patch 8.0.0359: 'number' and 'relativenumber' are not properly tested commit https://github.com/vim/vim/commit/dc9a081712ec8c140e6d4909e9f6b03a629d32d3 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 23 18:46:50 2017 +0100 patch 8.0.0359: 'number' and 'relativenumber' are not properly tested Problem: 'number' and 'relativenumber' are not properly tested. Solution: Add tests, change old style to new style tests. (Ozaki Kiichi, closes #1447)

" 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