patch 8.2.1306: checking for first character of dict key is inconsistent Commit: https://github.com/vim/vim/commit/b13ab99908097d54e21ab5adad22f4ad2a8ec688 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jul 27 21:43:28 2020 +0200 patch 8.2.1306: checking for first character of dict key is inconsistent Problem: Checking for first character of dict key is inconsistent. Solution: Add eval_isdictc(). (closes https://github.com/vim/vim/issues/6546)