patch 8.0.1825: might use NULL pointer when out of memory commit https://github.com/vim/vim/commit/dd1d7be4e6691f447667a8217844a3b2561203be Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 12 21:34:58 2018 +0200 patch 8.0.1825: might use NULL pointer when out of memory Problem: Might use NULL pointer when out of memory. (Coverity) Solution: Handle NULL pointer better.

" 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