patch 8.2.4941: '[ and '] marks may be wrong after undo Commit: https://github.com/vim/vim/commit/82444cefa3fef87624a078ea86a72af7ef4ef42e Author: LemonBoy <thatlemon@gmail.com> Date: Thu May 12 15:39:31 2022 +0100 patch 8.2.4941: '[ and '] marks may be wrong after undo Problem: '[ and '] marks may be wrong after undo. Solution: Adjust the '[ and '] marks if needed. (closes https://github.com/vim/vim/issues/10407, closes https://github.com/vim/vim/issues/1281)

" 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