commit https://github.com/vim/vim/commit/c8ce615299b4d8c1b2e6cf83496f48cd497d8a37 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 7 13:48:20 2016 +0200 patch 7.4.2174 Problem: Adding duplicate flags to 'whichwrap' leaves commas behind. Solution: Also remove the commas. (Naruhiko Nishino)

start:
test for empty string: ok
test for 1 char: ok
test for 3 chars: ok
test for contains meta char: ok
test for contains non-ascii char: ok