patch 8.0.0208: internally used commands end up in history commit https://github.com/vim/vim/commit/25b0e6b701a7a8dfcb4f60e217360a5c75053d8c Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 20 21:51:53 2017 +0100 patch 8.0.0208: internally used commands end up in history Problem: Internally used commands for CTRL-Z and mouse click end up in history. (Matthew Malcomson) Solution: Use do_cmdline_cmd() instead of stuffing them in the readahead buffer. (James McCoy, closes #1395)

" 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