Re: New undo element (fun . args)

[Richard Stallman]

    I don't know, but in the case of ses, it may not make sense to have
    undo in a region, and consequently may be quite hard to put something
    sensible into DELTA, BEG and END.

One of the undoable operations in SES is setting a variable.
This doesn't relate directly to buffer text, but it might
be associated with some region somehow.  I don't know
how this is used, and I think it is important to check.

Could someone check?

I sent another message asking Yavner to help with this.