fix indentation error

Author: charlesdong1991

Diff for: pandas/tests/test_strings.py

@@ -3443,10 +3443,8 @@ 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,