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GH-109190: Copyedit 3.12 What's New: Other Language Changes (#109660)

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Doc/whatsnew/3.12.rst
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@ -459,12 +459,12 @@ and others in :gh:`103764`.)
Other Language Changes
======================
* Add :ref:`perf_profiling` through the new
environment variable :envvar:`PYTHONPERFSUPPORT`,
the new command-line option :option:`-X perf <-X>`,
* Add :ref:`support for the perf profiler <perf_profiling>` through the new
environment variable :envvar:`PYTHONPERFSUPPORT`
and command-line option :option:`-X perf <-X>`,
as well as the new :func:`sys.activate_stack_trampoline`,
:func:`sys.deactivate_stack_trampoline`,
and :func:`sys.is_stack_trampoline_active` APIs.
and :func:`sys.is_stack_trampoline_active` functions.
(Design by Pablo Galindo. Contributed by Pablo Galindo and Christian Heimes
with contributions from Gregory P. Smith [Google] and Mark Shannon
in :gh:`96123`.)
@ -473,7 +473,7 @@ Other Language Changes
have a new a *filter* argument that allows limiting tar features than may be
surprising or dangerous, such as creating files outside the destination
directory.
See :ref:`tarfile-extraction-filter` for details.
See :ref:`tarfile extraction filters <tarfile-extraction-filter>` for details.
In Python 3.14, the default will switch to ``'data'``.
(Contributed by Petr Viktorin in :pep:`706`.)
@ -501,8 +501,8 @@ Other Language Changes
* A backslash-character pair that is not a valid escape sequence now generates
a :exc:`SyntaxWarning`, instead of :exc:`DeprecationWarning`.
For example, ``re.compile("\d+\.\d+")`` now emits a :exc:`SyntaxWarning`
(``"\d"`` is an invalid escape sequence), use raw strings for regular
expression: ``re.compile(r"\d+\.\d+")``.
(``"\d"`` is an invalid escape sequence, use raw strings for regular
expression: ``re.compile(r"\d+\.\d+")``).
In a future Python version, :exc:`SyntaxError` will eventually be raised,
instead of :exc:`SyntaxWarning`.
(Contributed by Victor Stinner in :gh:`98401`.)
@ -531,7 +531,7 @@ Other Language Changes
when summing floats or mixed ints and floats.
(Contributed by Raymond Hettinger in :gh:`100425`.)
* Exceptions raised in a typeobject's ``__set_name__`` method are no longer
* Exceptions raised in a class or type's ``__set_name__`` method are no longer
wrapped by a :exc:`RuntimeError`. Context information is added to the
exception as a :pep:`678` note. (Contributed by Irit Katriel in :gh:`77757`.)