replaced inplace=True for set index in testcase, added newline at the end of whatsnew file

P-Tillmann · P-Tillmann · commit 9af8a47eaccd · 2017-07-28T10:32:58.000+02:00
diff --git a/doc/source/whatsnew/v0.21.0.txt b/doc/source/whatsnew/v0.21.0.txt
@@ -327,4 +327,4 @@ Categorical
 Other
 ^^^^^
 - Bug in :func:`eval` where the ``inplace`` parameter was being incorrectly handled (:issue:`16732`)
-- Bug in ``.isin()`` in which checking membership in empty ``Series`` objects raised an error (:issue:`16991`)
+- Bug in ``.isin()`` in which checking membership in empty ``Series`` objects raised an error (:issue:`16991`)
diff --git a/pandas/tests/groupby/test_groupby.py b/pandas/tests/groupby/test_groupby.py
@@ -3899,7 +3899,7 @@ def test_gb_key_len_equal_axis_len(self):
                                ['foo', 'bar', 'B', 2],
                                ['foo', 'baz', 'C', 3]],
                               columns=['first', 'second', 'third', 'one'])
-            df.set_index(['first', 'second'], inplace=True)
+            df = df.set_index(['first', 'second'])
             df = df.groupby(['first', 'second', 'third']).size()
             assert df.loc[('foo', 'bar', 'B')] == 2
             assert df.loc[('foo', 'baz', 'C')] == 1
