Re: [PATCH v6 0/1] MR320: riched20/tests: Test for ITextDocument::Undo and ITextDocument::Redo (#53289).

[Jinoh Kang (＠iamahuman)]

Full implementation is at https://gitlab.winehq.org/iamahuman/wine/-/commits/riched20/richole-undo-imp..., although it doesn't pass test due to another unrelated bug in riched20 (i.e. missing wrap paragraph in richole).