Fix the damage to UserDict and its tests.
Clearly this is not the right way to fix this; UserDict and MixinDict
ought to be redesigned with the new dict API in mind.  But I'm not
claiming to be in charge of library redesign, I only want zero failing
tests.
diff --git a/Lib/test/test_userdict.py b/Lib/test/test_userdict.py
index 05d6d9e..500971b 100644
--- a/Lib/test/test_userdict.py
+++ b/Lib/test/test_userdict.py
@@ -92,7 +92,7 @@
         # Test keys, items, values
         self.assertEqual(u2.keys(), d2.keys())
         self.assertEqual(u2.items(), d2.items())
-        self.assertEqual(u2.values(), d2.values())
+        self.assertEqual(list(u2.values()), list(d2.values()))
 
         # Test "in".
         for i in u2.keys():