[Zope-Checkins] CVS: Zope/doc - CHANGES.txt:1.497

[Tim Peters]

Update of /cvs-repository/Zope/doc
In directory cvs.zope.org:/tmp/cvs-serv20938/doc

Modified Files:
	CHANGES.txt 
Log Message:
Negative weights behave as documented now for weightedUnion and
weightedIntersection.


=== Zope/doc/CHANGES.txt 1.496 => 1.497 ===
     Bugs Fixed
 
+      - The BTree module functions weightedIntersection() and
+        weightedUnion() now treat negative weights as documented.  It's
+        hard to explain what their effects were before this fix, as
+        the sign bits were getting confused with an internal
+        distinction between whether the result should be a set or a
+        mapping.
+
       - New "Transience" (session data storage) implementation.
         More reliable under high load.