Add to What's New

Author: encukou

Doc/whatsnew/3.15.rst

@@ -204,6 +204,11 @@ Other language changes
   controlled by :ref:`environment variables <using-on-controlling-color>`.
   (Contributed by Peter Bierma in :gh:`134170`.)
 
+* The :attr:`~object.__dict__` and :attr:`!__weakref__` descriptors now use a
+  single descriptor instance per interpreter, shared across all types that
+  need them.
+  (Contributed by Petr Viktorin in :gh:`135228`.)
+
 
 New modules
 ===========

Misc/NEWS.d/next/Core_and_Builtins/2025-08-05-10-22-15.gh-issue-136966.J5lrE0.rst

@@ -1,3 +1,3 @@
-The :attr:`type.__dict__` and :attr:`!__weakref__` descriptors now use a
+The :attr:`object.__dict__` and :attr:`!__weakref__` descriptors now use a
 single descriptor instance per interpreter, shared across all types that
 need them.