Fix python style in sql/test.

Author: kaka1992

python/pyspark/sql/tests.py

@@ -444,7 +444,7 @@ def test_between_function(self):
             Row(a=2, b=1, c=3),
             Row(a=4, b=1, c=4)]).toDF()
         self.assertEqual([False, True, True],
-                     df.select(df.a.between(df.b, df.c)).collect())
+                         df.select(df.a.between(df.b, df.c)).collect())
 
     def test_save_and_load(self):
         df = self.df