patch 8.0.1666: % argument in ch_log() causes trouble commit https://github.com/vim/vim/commit/d5359b24ceefefed4b3a37efd9bf54176935f3a5 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Apr 5 22:44:39 2018 +0200 patch 8.0.1666: % argument in ch_log() causes trouble Problem: % argument in ch_log() causes trouble. Solution: Use string as third argument in internal ch_log(). (Dominique Pelle, closes #2784)