patch 8.2.1562: Vim9: error when using "%" where a buffer is expected Commit: https://github.com/vim/vim/commit/3767e3a3302d745349eff8cfe45411f03e13de43 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Sep 1 23:06:01 2020 +0200 patch 8.2.1562: Vim9: error when using "%" where a buffer is expected Problem: Vim9: error when using "%" where a buffer is expected. Solution: Add tv_get_buf_from_arg(). (closes https://github.com/vim/vim/issues/6814)