patch 8.2.0368: Vim9: import that redefines local variable does not fail Commit: https://github.com/vim/vim/commit/5269bd2a724fdb8c16c9635ef744a670f1bc8bd5 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 9 19:25:27 2020 +0100 patch 8.2.0368: Vim9: import that redefines local variable does not fail Problem: Vim9: import that redefines local variable does not fail. Solution: Check for already defined symbols.

" 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