pythongh-141174: Test type_repr() of Template with invalid syntax in Interpolation (python#155661)

Test `type_repr()` of `Template` with invalid syntax in `Interpolation`

Author: dr-carlos

Lib/test/test_annotationlib.py

@@ -1881,6 +1881,10 @@ def nested():
             type_repr(Template("hi", Interpolation(42, "   "))),
             "Template('hi', Interpolation(42, '   ', None, ''))",
         )
+        self.assertEqual(
+            type_repr(Template("hi", Interpolation(42, "4!2"))),
+            "Template('hi', Interpolation(42, '4!2', None, ''))",
+        )
         # gh138558: perhaps in the future, we can improve this behavior:
         self.assertEqual(type_repr(Template(Interpolation(42, "99"))), "t'{99}'")