add a name to the other series

Author: Montana Low

pandas/tests/test_strings.py

@@ -1999,7 +1999,7 @@ def test_split_blank_string(self):
         exp = DataFrame([[]])
         tm.assert_frame_equal(result, exp)
 
-        values = Series(['a b c', 'a b', '', ' '])
+        values = Series(['a b c', 'a b', '', ' '], name='test')
         result = values.str.split(expand=True)
         exp = DataFrame([['a', 'b', 'c'], ['a', 'b', np.nan],
                          [np.nan, np.nan, np.nan], [np.nan, np.nan, np.nan]])