patch 9.0.1877: missing test for patch 9.0.1873 Commit: https://github.com/vim/vim/commit/18d2709aa12ffa3f6ae1a13059990558c5f8e406 Author: Christian Brabandt <cb@256bit.org> Date: Wed Sep 6 19:53:36 2023 +0200 patch 9.0.1877: missing test for patch 9.0.1873 Problem: missing test for patch 9.0.1873 Solution: add a test trying to exchange windows Add a test, making sure that switching windows is not allowed when textlock is active, e.g. when running `:s/<pat>/\=func()/` Signed-off-by: Christian Brabandt <cb@256bit.org>