Re: undo in loaddefs.el buffer

[Richard Stallman]

    > 4. Another idea is that batch mode could always turn off undo.  That
    > is a little drastic as a change, but what do people think of it?

    It depends just on how undo gets turned off.

The most obvious way is to make buffer-undo-list default to t in new
buffers, in batch mode.

                                                  There are cases where
    editing operations are done by making use of undo (X-Symbol does some
    sort of association by doing a one-way conversion, placing markers at
    positions matched with a string, then undoing everything to see where
    the markers end up).

In order for such packages to work in buffers in which the user has
turned off undo, they have to be able to turn undo on temporarily
in a way that the user won't notice.  Does x-symbol do that?

Once they do this properly, they won't have any trouble if batch
mode turns off undo in all buffers by default.