patch 8.2.1577: Vim9: hasmapto()/mapcheck()/maparg() do nottake "true" arg Commit: https://github.com/vim/vim/commit/04d594b9c14299ed50da0774fb8d3a10fbc4076f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Sep 2 22:25:35 2020 +0200 patch 8.2.1577: Vim9: hasmapto()/mapcheck()/maparg() do nottake "true" arg Problem: Vim9: hasmapto(), mapcheck() and maparg() do not take "true" as argument. Solution: Use tv_get_bool(). (closes #6822, closes #6824)