fix patchcheck

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: AlexWaygood

Lib/test/test_ast.py

@@ -468,8 +468,8 @@ def test_field_attr_existence_deprecated(self):
                     # The argument is required.
                     continue
                 with self.subTest(item):
-                 with self.assertWarns(DeprecationWarning):
-                    x = item()
+                    with self.assertWarns(DeprecationWarning):
+                        x = item()
                 if isinstance(x, ast.AST):
                     self.assertEqual(type(x._fields), tuple)