patch 8.2.1577: Vim9: hasmapto()/mapcheck()/maparg() do nottake "true" arg Commit: https://github.com/vim/vim/commit/04d594b9c14299ed50da0774fb8d3a10fbc4076f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Sep 2 22:25:35 2020 +0200 patch 8.2.1577: Vim9: hasmapto()/mapcheck()/maparg() do nottake "true" arg Problem: Vim9: hasmapto(), mapcheck() and maparg() do not take "true" as argument. Solution: Use tv_get_bool(). (closes #6822, closes #6824)

" 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