Apply suggestions from code review

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: JelleZijlstra

Doc/library/typing.rst

@@ -2970,7 +2970,7 @@ types.
    .. versionchanged:: 3.13
       Support for the :data:`ReadOnly` qualifier was added. See :pep:`705`.
 
-   .. versionchanged:: 3.15
+   .. versionchanged:: next
       Support for the *closed* and *extra_items* class arguments was added. See :pep:`728`.
 
 

Doc/whatsnew/3.15.rst

@@ -79,7 +79,7 @@ Summary -- Release highlights
   <whatsnew315-unpacking-in-comprehensions>`
 * :pep:`686`: :ref:`Python now uses UTF-8 as the default encoding
   <whatsnew315-utf8-default>`
-* :pep:`728`: :ref:`TypedDict with typed extra items <whatsnew315-pep728>`
+* :pep:`728`: :ref:`TypedDict with typed extra items <whatsnew315-typeddict>`
 * :pep:`747`: :ref:`Annotating type forms with TypeForm
   <whatsnew315-typeform>`
 * :pep:`800`: Disjoint bases in the type system
@@ -1433,7 +1433,7 @@ typing
 
   (Contributed by Jelle Zijlstra in :gh:`145033`.)
 
-.. _whatsnew315-pep728:
+.. _whatsnew315-typeddict:
 
 * :pep:`728`: Add support in :class:`~typing.TypedDict` for the *closed*
   and *extra_items* class arguments. A closed :class:`~typing.TypedDict`