patch 9.0.0647: the 'splitscroll' option is not a good name Commit: https://github.com/vim/vim/commit/13ece2ae1d09009d3fb8acf858c288e7848ecdac Author: Luuk van Baal <luukvbaal@gmail.com> Date: Mon Oct 3 15:28:08 2022 +0100 patch 9.0.0647: the 'splitscroll' option is not a good name Problem: The 'splitscroll' option is not a good name. Solution: Rename 'splitscroll' to 'splitkeep' and make it a string option, also supporting "topline". (Luuk van Baal, closes #11258)