fix indentation error

Author: charlesdong1991

pandas/tests/test_strings.py

@@ -3444,9 +3444,10 @@ def test_replace_single_pattern(self, regex, expected_array):
     @pytest.mark.parametrize("input_array, single_char, replace_char, "
                              "expect_array, warn",
                              [
-                                ("a.c", ".", "b", "abc", True),
-                                ("a@c", "@", "at", "aatc", False)
-                                ])
+                              ("a.c", ".", "b", "abc", True),
+                              ("a@c", "@", "at", "aatc", False)
+                                ]
+                             )
     def test_replace_warning_single_character(self, input_array,
                                               single_char, replace_char,
                                               expect_array, warn):