🚀 go-pugleaf

Hey folks,

 I don't read the newsgroups that closely so I apologize if this is a
repeat...

 I am running 18.57 on a Sun 4.  I was running 18.55 on a Sun 4.
Under 18.57, S.el was behaving strangely.  Essentially, when started,
an extra character would be inserted into the buffer.

 I traced this behavior to something of the basic form:
 (kill-region (point-max) (point-max))
 (yank)

 Apparently, this code behaves somewhat upredicatable depending on
what is in the undo list and kill rings.

 The difference seems to come down to a change in the definition of
kill-region between 18.55 and 18.57.  It seems that kill-region is now
defined so that a region is deleted, and then the top of the undo list
is pushed into the kill ring.

 Normally, this doesn't make any difference, but when delete-region is
called with an empty region, the undo list has a nil added instead of
an empty string.

 A simple demonstration of this is: C-SPC C-w C-y.

-Michael