Re: [PATCH v4 0/1] MR320: riched20/tests: Test for ITextDocument::Undo and ITextDocument::Redo (#53289).

[Jinoh Kang (＠iamahuman)]

v3: Remove the state transition table and fold it into the action function.

Also note: the full patch that implements Undo/Redo after !320 and !326 is at https://testbot.winehq.org/GetFile.pl?JobKey=117985&StepKey=1