--- a/mercurial/formatter.py	Sun Oct 06 19:25:18 2019 -0400
+++ b/mercurial/formatter.py	Mon Oct 07 00:04:04 2019 -0400
@@ -280,7 +280,7 @@
 def _iteritems(data):
     '''iterate key-value pairs in stable order'''
     if isinstance(data, dict):
-        return sorted(data.iteritems())
+        return sorted(pycompat.iteritems(data))
     return data