patch 8.2.4679: cannot have expandcmd() give an error message for mistakes Commit: https://github.com/vim/vim/commit/2b74b6805b5c8c4836b66df5d949f5ff6a77f8c7 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Sun Apr 3 21:30:32 2022 +0100 patch 8.2.4679: cannot have expandcmd() give an error message for mistakes Problem: Cannot have expandcmd() give an error message for mistakes. Solution: Add an optional argument to give errors. Fix memory leak when expanding files fails. (Yegappan Lakshmanan, closes #10071)

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