patch 9.0.0748: Kitty may send key without modifiers with CSI u code Commit: https://github.com/vim/vim/commit/b9c09c118e951bc6ea2059941101939dc572b4ce Author: Trygve Aaberge <trygveaa@gmail.com> Date: Fri Oct 14 12:08:24 2022 +0100 patch 9.0.0748: Kitty may send key without modifiers with CSI u code Problem: Kitty may send key without modifiers with CSI u code. Solution: Handle CSI u code without modifiers. (Trygve Aaberge, closes #11364)