Re: New undo element (fun . args)

[Richard Stallman]

    100% agreement.  I even suggest we pass the BEG and END args to FUN.
    I.e. basically keep the current setup, except require the first 2 args to be
    BEG and END.

That would be a nuisance; you would be unable to use existing functions
for this purpose.

By the way, note that we would have to change SES to handle the new
format, if we change the format.