patch 8.0.1370: channel test for callback is flaky commit https://github.com/vim/vim/commit/1eca6f13d62d2201f3bf0e83400c2e3de7df3951 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Dec 5 14:04:27 2017 +0100 patch 8.0.1370: channel test for callback is flaky Problem: Channel test for callback is flaky. Solution: Add the test to thelist of flaky tests.

" 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