Re: undo in loaddefs.el buffer

[Luc Teirlinck]

Richard Stallman wrote:

   A timer that modifies the buffer should always create an undo
   boundary.  Can people fix these timers to do so?

If they think about it.  Maybe we should add something to
`(elisp)Timers' about this, if we are sure that we definitely do not
want timers do make undo boundaries automatically.  I could do this,
if desired.

   Which programs are these timers in, anyway?
   We need to look at these issues in their specifics
   to be able to think about them.

The one I _know_ about is autorevert.  However, autorevert currently
only autoreverts file visiting buffers, Dired and the Buffer Menu.  I
took care of the only one that gave problems, the Buffer Menu.

Should we decide that we want to take care of potential further types
of autoreverted non-file buffers individually as they get added, then
I still would have to look at the new  Auto Revert Tail mode, because
there could still be a problem there.

While autorevert is the only concrete example I know, I would be very
surprised if it were the only example of a timer modifying buffers. 

Sincerely,

Luc.