Update error message

Author: ilevkivskyi

test-data/unit/check-classes.test

@@ -8927,9 +8927,9 @@ class C:
         __module__  # E: Name "__module__" is not defined
         __qualname__  # E: Name "__qualname__" is not defined
 
-    x: __module__  # E: Variable "__module__" is not valid as a type \
+    x: __module__  # E: Variable "__main__.C.__module__" is not valid as a type \
                    # N: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
-    y: __qualname__  # E: Variable "__qualname__" is not valid as a type \
+    y: __qualname__  # E: Variable "__main__.C.__qualname__" is not valid as a type \
                      # N: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
 
 [case testPropertySetterType]