patch 8.1.0269: Ruby Kernel.#p method always returns nil commit https://github.com/vim/vim/commit/51e9fbf1c7ab4ec61ac959d72d5d5cb0a0b356bb Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 11 14:24:11 2018 +0200 patch 8.1.0269: Ruby Kernel.#p method always returns nil Problem: Ruby Kernel.#p method always returns nil. Solution: Copy p method implementation from Ruby code. (Masataka Pocke Kuwabara, closes #3315)

" 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