patch 8.2.0834: :drop command in terminal popup causes problems Commit: https://github.com/vim/vim/commit/3f65c66df95445ef84f98de007c9b70ce23f54a0 Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 27 23:15:16 2020 +0200 patch 8.2.0834: :drop command in terminal popup causes problems Problem: :drop command in terminal popup causes problems. Solution: Check for using a popup window. (closes https://github.com/vim/vim/issues/6151)

" 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