commit https://github.com/vim/vim/commit/ddf8d1c746ee081d15c9d7e0515f6ac43adbf363 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jun 20 11:22:54 2016 +0200 patch 7.4.1945 Problem: The Man plugin doesn't work that well. Solution: Use "g:ft_man_open_mode" to be able open man pages in vert split or separate tab. Set nomodifiable for buffer with man content. Add a test. (Andrey Starodubtsev, closes #873)

" 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