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gh-95913: Copyedit/improve Implementation Changes What's New section (GH-97720)

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* Add and refine reST/Sphinx syntax for implementation changes section

* Clarify and refine wording in the Implementation Changes section

* Elide unnecessary comma

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
(cherry picked from commit 4e731814d7)

Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>
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Doc/whatsnew/3.11.rst
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@ -480,17 +480,24 @@ Other Language Changes
there is a mixture of :class:`str` and :class:`bytes` keys. there is a mixture of :class:`str` and :class:`bytes` keys.
(Contributed by Thomas Grainger in :gh:`91181`.) (Contributed by Thomas Grainger in :gh:`91181`.)
.. _whatsnew311-other-implementation-changes:
Other CPython Implementation Changes Other CPython Implementation Changes
==================================== ====================================
* Special methods :meth:`complex.__complex__` and :meth:`bytes.__bytes__` are implemented to * The special methods :meth:`~object.__complex__` for :class:`complex`
support :class:`typing.SupportsComplex` and :class:`typing.SupportsBytes` protocols. and :meth:`~object.__bytes__` for :class:`bytes` are implemented to support
the :class:`typing.SupportsComplex` and :class:`typing.SupportsBytes` protocols.
(Contributed by Mark Dickinson and Dong-hee Na in :issue:`24234`.) (Contributed by Mark Dickinson and Dong-hee Na in :issue:`24234`.)
* ``siphash13`` is added as a new internal hashing algorithms. It has similar security * ``siphash13`` is added as a new internal hashing algorithm.
properties as ``siphash24`` but it is slightly faster for long inputs. ``str``, ``bytes``, It has similar security properties as ``siphash24``,
and some other types now use it as default algorithm for :func:`hash`. :pep:`552` but it is slightly faster for long inputs.
hash-based pyc files now use ``siphash13``, too. :class:`str`, :class:`bytes`, and some other types
now use it as the default algorithm for :func:`hash`.
:pep:`552` :ref:`hash-based .pyc files <pyc-invalidation>`
now use ``siphash13`` too.
(Contributed by Inada Naoki in :issue:`29410`.) (Contributed by Inada Naoki in :issue:`29410`.)
* When an active exception is re-raised by a :keyword:`raise` statement with no parameters, * When an active exception is re-raised by a :keyword:`raise` statement with no parameters,
@ -499,25 +506,28 @@ Other CPython Implementation Changes
reflected in the re-raised exception. reflected in the re-raised exception.
(Contributed by Irit Katriel in :issue:`45711`.) (Contributed by Irit Katriel in :issue:`45711`.)
* The interpreter state's representation of handled exceptions (a.k.a exc_info, or * The interpreter state's representation of handled exceptions
_PyErr_StackItem) now has only the ``exc_value`` field, ``exc_type`` and ``exc_traceback`` (aka ``exc_info`` or ``_PyErr_StackItem``)
have been removed as their values can be derived from ``exc_value``. now only has the ``exc_value`` field; ``exc_type`` and ``exc_traceback``
have been removed, as they can be derived from ``exc_value``.
(Contributed by Irit Katriel in :issue:`45711`.) (Contributed by Irit Katriel in :issue:`45711`.)
* A new command line option for the Windows installer ``AppendPath`` has been added. * A new :ref:`command line option <install-quiet-option>`, ``AppendPath``,
It behaves similiar to ``PrependPath`` but appends the install and scripts directories has been added for the Windows installer.
instead of prepending them. It behaves similarly to ``PrependPath``,
but appends the install and scripts directories instead of prepending them.
(Contributed by Bastian Neuburger in :issue:`44934`.) (Contributed by Bastian Neuburger in :issue:`44934`.)
* The :c:member:`PyConfig.module_search_paths_set` field must now be set to 1 for * The :c:member:`PyConfig.module_search_paths_set` field must now be set to ``1`` for
initialization to use :c:member:`PyConfig.module_search_paths` to initialize initialization to use :c:member:`PyConfig.module_search_paths` to initialize
:data:`sys.path`. Otherwise, initialization will recalculate the path and replace :data:`sys.path`. Otherwise, initialization will recalculate the path and replace
any values added to ``module_search_paths``. any values added to ``module_search_paths``.
* The output of the :option:`--help` option is changed to fit inside 50 lines and 80 * The output of the :option:`--help` option now fits in 50 lines/80 columns.
columns. Information about :ref:`Python environment variables <using-on-envvars>` Information about :ref:`Python environment variables <using-on-envvars>`
and :option:`-X options <-X>` is available with the new :option:`--help-env` or and :option:`-X` options is now available using the respective
:option:`--help-xoptions` flags, and with :option:`--help-all`. :option:`--help-env` and :option:`--help-xoptions` flags,
and with the new :option:`--help-all`.
(Contributed by Éric Araujo in :issue:`46142`.) (Contributed by Éric Araujo in :issue:`46142`.)
* Converting between :class:`int` and :class:`str` in bases other than 2 * Converting between :class:`int` and :class:`str` in bases other than 2