Fix typo (thanks Nick).

rhettinger · rhettinger · commit b34604233ad9 · 2008-02-04T22:09:30.000Z
diff --git a/Lib/_abcoll.py b/Lib/_abcoll.py
@@ -382,7 +382,7 @@ def __eq__(self, other):
         return set(self) == set(other)
 
     def __ne__(self, other):
-        return set(self) == set(other)
+        return set(self) != set(other)
 
 class MappingView(metaclass=ABCMeta):
 
