patch 8.2.4576: Vim9: error for comparing with null can be annoying Commit: https://github.com/vim/vim/commit/056678184f679c2989b73bd48eda112f3c79a62f Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 15 20:21:33 2022 +0000 patch 8.2.4576: Vim9: error for comparing with null can be annoying Problem: Vim9: error for comparing with null can be annoying. Solution: Allow comparing anything with null. (closes https://github.com/vim/vim/issues/9948)

" 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