patch 9.0.2182: Vim9: need a way to reserve future extension Commit: https://github.com/vim/vim/commit/ff6f0d5c38e81f742e1161c1504fc6b8e45d9a1e Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Thu Dec 21 16:46:18 2023 +0100 patch 9.0.2182: Vim9: need a way to reserve future extension Problem: Vim9: need a way to reserve future extension Solution: reserve double underscore prefix for future use (Yegappan Lakshmanan) related: #13238 closes: #13742 Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com> Signed-off-by: Christian Brabandt <cb@256bit.org>