[editing-explainer] Should undo/redo be beforeInput events? (#30)

How do we determine when we need a new event? Or is everything just going to use beforeInput? This also applies to custom events if we support them, like 'checkout' event or 'save' event.
-From MS Office Team

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/editing-explainer/issues/30