bug#23785: Emacs 25: "Undo" overdoes things.

[Stefan Monnier]

> My concern is not with the behavior the proposed change intends to get
> us, the concern is with the unintended consequences of the change.  At
> this late stage, I'd like to keep the risk of unintended consequences
> to the minimum, unless we want this change so badly we agree to extend
> the pretesting by another month or two.

Yes, that's the other side of the coin, indeed.


        Stefan