updated regex in test

Author: randolf-scholz

Lib/test/test_patma.py

@@ -3413,7 +3413,8 @@ def test_class_pattern_not_type(self):
     def test_class_or_union_not_specialform(self):
         w = None
         from typing import Literal
-        msg = 'called match pattern must be a class or a union'
+        name = type(Literal).__name__
+        msg = rf"called match pattern must be a class or a union \(got {name}\)"
         with self.assertRaisesRegex(TypeError, msg):
             match 1:
                 case Literal():