patch 9.0.1667: regression test doesn't fail when fix is reverted Commit: https://github.com/vim/vim/commit/e42989374144a63d986b878618aeac328e35ac3b Author: zeertzjq <zeertzjq@outlook.com> Date: Mon Jun 26 19:02:43 2023 +0100 patch 9.0.1667: regression test doesn't fail when fix is reverted Problem: Regression test doesn't fail when fix is reverted. Solution: Add "n" to 'cpoptions' instead of using :winsize. (closes https://github.com/vim/vim/issues/12587, issue #12528)