patch 9.0.1856: issues with formatting positional arguments Commit: https://github.com/vim/vim/commit/aa90d4f031f73a34aaef5746931ea746849a2231 Author: Christ van Willegen <cvwillegen@gmail.com> Date: Sun Sep 3 17:22:37 2023 +0200 patch 9.0.1856: issues with formatting positional arguments Problem: issues with formatting positional arguments Solution: fix them, add tests and documentation closes: #12140 closes: #12985 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Christ van Willegen <cvwillegen@gmail.com> Tentatively fix message_test. Check NULL ptr.