patch 9.0.1036: undo misbehaves when writing from an insert mode mapping Commit: https://github.com/vim/vim/commit/3f8f82772313af9f2417b06651f30988b63e1c96 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 8 21:49:35 2022 +0000 patch 9.0.1036: undo misbehaves when writing from an insert mode mapping Problem: Undo misbehaves when writing from an insert mode mapping. Solution: Sync undo when writing. (closes https://github.com/vim/vim/issues/11674)

README_src.txt for version 9.0 of Vim: Vi IMproved.

The source archive contains the files needed to compile Vim on Unix systems.
It is packed for Unix systems (NL line separator).

For more information, see the README.txt file that comes with the runtime
archive (vim-9.0-rt.tar.gz).  To be able to run Vim you MUST get the runtime
archive too!