patch 9.0.1418: the included xdiff code is a bit outdated Commit: https://github.com/vim/vim/commit/5fedb8a5ab7addb584728c89e809be190de992bf Author: Yee Cheng Chin <ychin.git@gmail.com> Date: Mon Mar 20 17:30:52 2023 +0000 patch 9.0.1418: the included xdiff code is a bit outdated Problem: The included xdiff code is a bit outdated. Solution: Sync with the latest git xdiff code. (Yee Cheng Chin, closes #12181)