commit https://github.com/vim/vim/commit/9b05a0d0f94d8c4c1ddd51e7f31b73f7556bdbdc Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 31 21:19:49 2015 +0100 patch 7.4.1013 Problem: The local value of 'errorformat' is not used for ":lexpr" and ":cexpr". Solution: Use the local value if it exists. (Christian Brabandt) Adjust the help for this.

" 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