patch 9.0.1647: insufficient testing for syntax plugins Commit: https://github.com/vim/vim/commit/1aa5f1c21fea60fe64cdcdf6990bf43ea5cc78a0 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 22 21:57:51 2023 +0100 patch 9.0.1647: insufficient testing for syntax plugins Problem: Insufficient testing for syntax plugins. Solution: Add shell file examples. (Charles Campbell) Create a messages file for easier debugging and reporting the test results.

" 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