Update Lib/dataclasses.py

Co-authored-by: sobolevn <[email protected]>

Author: thejcannon

Lib/dataclasses.py

@@ -1300,7 +1300,7 @@ def _add_slots(cls, is_frozen, weakref_slot, defined_fields):
     cls_dict.pop('__weakref__', None)  # gh-102069
 
     # Set the `__qualname__ accordingly
-    if (qualname := getattr(cls, '__qualname__', None) is not None):
+    if (qualname := getattr(cls, '__qualname__', None)) is not None:
         cls_dict['__qualname__'] = qualname
 
     # And finally create the class.