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--- unittest2/compatibility.py.orig 2014-10-29 10:51:58 UTC
+++ unittest2/compatibility.py
@@ -140,7 +140,7 @@ except ImportError:
### ChainMap (helper for configparser and string.Template)
########################################################################
-class ChainMap(collections.MutableMapping):
+class ChainMap(collections.abc.MutableMapping):
''' A ChainMap groups multiple dicts (or other mappings) together
to create a single, updateable view.
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