patch 8.2.2267: Vim9: cannot use unlet for a dict member Commit: https://github.com/vim/vim/commit/c368957b1904bfaa2b0b52bbcade51b20173f3ed Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 1 19:40:02 2021 +0100 patch 8.2.2267: Vim9: cannot use unlet for a dict member Problem: Vim9: cannot use unlet for a dict member. Solution: Pass GLV_NO_DECL to get_lval(). (closes https://github.com/vim/vim/issues/7585)

" 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