Escape parentheses in regex pattern to fix test match

Author: donbarbos

Lib/test/test_type_annotations.py

@@ -301,7 +301,7 @@ def check_annotations(self, f):
             print(f.__annotations__)
 
         f.__annotate__ = lambda x: 42
-        with self.assertRaisesRegex(TypeError, r"__annotate__() must return type dict of type 'int'"):
+        with self.assertRaisesRegex(TypeError, r"__annotate__\(\) must return type dict of type 'int'"):
             print(f.__annotations__)
 
         f.__annotate__ = lambda x: {"x": x}