patch 8.1.1924: using empty string for current buffer is unexpected Commit: https://github.com/vim/vim/commit/a8eee21e75324d199acb1663cb5009e03014a13a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 24 22:14:58 2019 +0200 patch 8.1.1924: using empty string for current buffer is unexpected Problem: Using empty string for current buffer is unexpected. Solution: Make the argument optional for bufname() and bufnr().