Fixed tz name

Author: TomAugspurger

pandas/tests/frame/test_dtypes.py

@@ -91,7 +91,7 @@ def test_datetime_with_tz_dtypes(self):
         tzframe.iloc[1, 2] = pd.NaT
         result = tzframe.dtypes.sort_index()
         expected = Series([np.dtype('datetime64[ns]'),
-                           DatetimeTZDtype('ns', 'US/Eastern]'),
+                           DatetimeTZDtype('ns', 'US/Eastern'),
                            DatetimeTZDtype('ns', 'CET')],
                           ['A', 'B', 'C'])