commit https://github.com/vim/vim/commit/0ba75a9714884895b2ac09733158c47544a8dfb9 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Feb 19 23:21:26 2016 +0100 patch 7.4.1360 Problem: Can't remove a callback with ch_setoptions(). Solution: When passing zero or an empty string remove the callback.

1 a aa abb abbcc
2 d dd dee deeff
3 g gg ghh ghhii
4 j jj jkk jkkll
5 m mm mnn mnnoo
6 x aa$ x
7 (a)(b) abba
8 axx ab]xx
9 foobar
9 foo