Fix up docs

Author: markshannon

Doc/c-api/tuple.rst

@@ -86,7 +86,7 @@ Tuple Objects
 
    Insert a reference to object *o* at position *pos* of the tuple pointed to by
    *p*.  Return ``0`` on success.  If *pos* is out of bounds, return ``-1``
-   and set an :exc:`IndexError` exception.
+   and set an :exc:`IndexError` exception. Both ``p`` and ``o`` must be non-``NULL``.
 
    .. note::
 

Doc/whatsnew/3.13.rst

@@ -2661,10 +2661,6 @@ Changes in the C API
 
   Note that ``Py_TRASHCAN_BEGIN`` has a second argument which
   should be the deallocation function it is in. The new macros were
-* The :c:func:`PyTuple_SET_ITEM` inline function may not be passed ``NULL``.
-  This has always been the documented behavior, but was not enforced for
-  the value until now. :c:var:``Py_None` should be used instead of ``NULL``.
-
   added in Python 3.8 and the old macros were deprecated in Python 3.11.
   (Contributed by Irit Katriel in :gh:`105111`.)
 

Doc/whatsnew/3.14.rst

@@ -827,6 +827,10 @@ Porting to Python 3.14
   implementation details.
   (Contributed by Victor Stinner in :gh:`120600` and :gh:`124127`.)
 
+* The :c:func:`PyTuple_SET_ITEM` inline function may not be passed ``NULL``.
+  This has always been the documented behavior, but was not enforced for
+  the value until now. :c:var:``Py_None` should be used instead of ``NULL``.
+
 
 Deprecated
 ----------