patch 8.0.1475: invalid memory access in read_redo() commit https://github.com/vim/vim/commit/f12519dec88251305793f1651f558d16506b4be2 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Feb 6 22:52:49 2018 +0100 patch 8.0.1475: invalid memory access in read_redo() Problem: Invalid memory access in read_redo(). (gy741) Solution: Convert the replacement character back from a negative number to CR or NL. (hint by Dominique Pelle, closes #2616)

" 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