Docs: Datamodel: Merge "Notes on using __slots__" with the parent section (#108400)

AA-Turner · web-flow · commit 7f5b1a06612b · 2023-08-25T12:27:36.000+02:00
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
@@ -1920,8 +1920,7 @@ Attribute lookup speed can be significantly improved as well.
 
 .. _datamodel-note-slots:
 
-Notes on using *__slots__*
-""""""""""""""""""""""""""
+Notes on using *__slots__*:
 
 * When inheriting from a class without *__slots__*, the
   :attr:`~object.__dict__` and
