blurb and docs

Author: AlexWaygood

Doc/deprecations/pending-removal-in-3.17.rst

@@ -9,14 +9,14 @@ Pending removal in Python 3.17
     3.17. Users should use documented introspection helpers like :func:`typing.get_origin`
     and :func:`typing.get_args` instead of relying on private implementation details.
   - :class:`typing.ByteString`, deprecated since Python 3.9, is scheduled for removal in
-    Python 3.17. Prefer :class:`~collections.abcSequence` or
+    Python 3.17. Prefer :class:`~collections.abc.Sequence` or
     :class:`~collections.abc.Buffer`. For use in type annotations, prefer a union, like
     ``bytes | bytearray``, or :class:`collections.abc.Buffer`.
     (Contributed by Shantanu Jain in :gh:`91896`.)
 
 * :mod:`collections.abc`:
 
   - :class:`collections.abc.ByteString` is scheduled for removal in Python 3.17. Prefer
-    :class:`~collections.abcSequence` or :class:`~collections.abc.Buffer`. For use in
+    :class:`~collections.abc.Sequence` or :class:`~collections.abc.Buffer`. For use in
     type annotations, prefer a union, like ``bytes | bytearray``, or
     :class:`collections.abc.Buffer`. (Contributed by Shantanu Jain in :gh:`91896`.)

Misc/NEWS.d/next/Library/2025-09-16-15-56-29.gh-issue-118803.aOPtmL.rst

@@ -0,0 +1,3 @@
+Add back :class:`collections.abc.ByteString` and :class:`typing.ByteString`.
+Both had been removed in prior alpha, beta and release candidates for Python
+3.14, but their removal has now been postponed to Python 3.17.