patch 8.1.0865: when 'listchars' only contains "nbsp:X" it does not work commit https://github.com/vim/vim/commit/895d966e341c187ffcf9da88dba193cbfcebf000 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 31 21:57:21 2019 +0100 patch 8.1.0865: when 'listchars' only contains "nbsp:X" it does not work Problem: When 'listchars' only contains "nbsp:X" it does not work. Solution: Set extra_check when lcs_nbsp is set. (Ralf Schandl, closes https://github.com/vim/vim/issues/3889)