Merge: whatsnew updates for smtplib and collections.Counter.
diff --git a/Misc/HISTORY b/Misc/HISTORY
index 728402e..954a87f 100644
--- a/Misc/HISTORY
+++ b/Misc/HISTORY
@@ -2881,8 +2881,9 @@
 - Issue #12540: Prevent zombie IDLE processes on Windows due to changes
   in os.kill().
 
-- Add support for unary plus and unary minus to collections.Counter().
-  Issue #13121: Also add support for inplace math operators.
+- Issue #13121: add support for inplace math operators to collections.Counter.
+
+- Add support for unary plus and unary minus to collections.Counter.
 
 - Issue #12683: urlparse updated to include svn as schemes that uses relative
   paths. (svn from 1.5 onwards support relative path).