commit https://github.com/vim/vim/commit/cbfe32953aea09d35d9ac7e5865c915b14e310c1 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 2 20:59:10 2016 +0100 patch 7.4.1032 Problem: message from assert_false() does not look nice. Solution: Handle missing sourcing_name. Use right number of spaces. (Watiko) Don't use line number if it's zero.