*** The new functions next-char-property-change and<BR>
previous-char-property-change scan through the buffer looking for a
place where either a text property or an overlay might change.  The
functions take two arguments, POSITION and LIMIT.  POSITION is the
starting position for the scan.  LIMIT says where to stop the scan.
<P>
If no property change is found before LIMIT, the value is LIMIT.  If
LIMIT is nil, scan goes to the beginning or end of the accessible part
of the buffer.  If no property change is found, the value is the
position of the beginning or end of the buffer.
<P>