patch 8.0.0615: using % with :hardcopy wrongly escapes spaces commit https://github.com/vim/vim/commit/bf15b8d78b22661db8b19d662b62bb9a061cdd37 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 4 20:43:48 2017 +0200 patch 8.0.0615: using % with :hardcopy wrongly escapes spaces Problem: Using % with :hardcopy wrongly escapes spaces. (Alexey Muranov) Solution: Expand % differently. (Christian Brabandt, closes https://github.com/vim/vim/issues/1682)

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