The __all__ value for 'collections' was missing UserList and UserString.
diff --git a/Lib/collections.py b/Lib/collections.py
index dafc5e5..f746145 100644
--- a/Lib/collections.py
+++ b/Lib/collections.py
@@ -1,4 +1,5 @@
-__all__ = ['deque', 'defaultdict', 'namedtuple', 'UserDict']
+__all__ = ['deque', 'defaultdict', 'namedtuple', 'UserDict', 'UserList',
+ 'UserString']
# For bootstrapping reasons, the collection ABCs are defined in _abcoll.py.
# They should however be considered an integral part of collections.py.
from _abcoll import *