fixup! use repr

Author: TomAugspurger

pandas/core/arrays/categorical.py

@@ -1993,6 +1993,9 @@ def __unicode__(self):
     def __repr__(self):
         return super(ExtensionArray, self).__repr__()
 
+    def __bytes__(self):
+        return super(ExtensionArray, self).__bytes__()
+
     def _maybe_coerce_indexer(self, indexer):
         """ return an indexer coerced to the codes dtype """
         if isinstance(indexer, np.ndarray) and indexer.dtype.kind == 'i':