patch 8.2.1488: text does not scroll when inserting above first line Commit: https://github.com/vim/vim/commit/9dc1917f42b23277e143fc58bbe27482b0b76bad Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 19 20:19:48 2020 +0200 patch 8.2.1488: text does not scroll when inserting above first line Problem: Text does not scroll when inserting above first line. Solution: Adjust off-by-one error. (Ken Takata, closes https://github.com/vim/vim/issues/6739)