commit https://github.com/vim/vim/commit/574860b5ee9da281c875dad07a607454e135eaee Author: Bram Moolenaar <Bram@vim.org> Date: Tue May 24 17:33:34 2016 +0200 patch 7.4.1838 Problem: Functions specifically for testing do not sort together. Solution: Rename garbagecollect_for_testing() to test_garbagecollect_now(). Add test_null_list(), test_null_dict(), etc.