gh-133879: Copyedit "What's new in Python 3.15" (#145737)

Author: hugovk

Doc/whatsnew/3.15.rst

@@ -66,27 +66,30 @@ Summary -- Release highlights
 .. PEP-sized items next.
 
 * :pep:`810`: :ref:`Explicit lazy imports for faster startup times
-  <whatsnew315-pep810>`
+  <whatsnew315-lazy-imports>`
 * :pep:`814`: :ref:`Add frozendict built-in type
   <whatsnew315-frozendict>`
 * :pep:`799`: :ref:`A dedicated profiling package for organizing Python
   profiling tools <whatsnew315-profiling-package>`
 * :pep:`799`: :ref:`Tachyon: High frequency statistical sampling profiler
   <whatsnew315-sampling-profiler>`
-* :pep:`798`: :ref:`Unpacking in Comprehensions
+* :pep:`798`: :ref:`Unpacking in comprehensions
   <whatsnew315-unpacking-in-comprehensions>`
 * :pep:`686`: :ref:`Python now uses UTF-8 as the default encoding
   <whatsnew315-utf8-default>`
+* :pep:`728`: ``TypedDict`` with typed extra items
+* :pep:`747`: :ref:`Annotating type forms with TypeForm
+  <whatsnew315-typeform>`
 * :pep:`782`: :ref:`A new PyBytesWriter C API to create a Python bytes object
-  <whatsnew315-pep782>`
+  <whatsnew315-pybyteswriter>`
 * :ref:`The JIT compiler has been significantly upgraded <whatsnew315-jit>`
 * :ref:`Improved error messages <whatsnew315-improved-error-messages>`
 
 
 New features
 ============
 
-.. _whatsnew315-pep810:
+.. _whatsnew315-lazy-imports:
 
 :pep:`810`: Explicit lazy imports
 ---------------------------------
@@ -120,12 +123,12 @@ name:
 .. code-block:: python
 
    lazy import json
-   lazy from datetime import datetime
+   lazy from pathlib import Path
 
-   print("Starting up...")  # json and datetime not loaded yet
+   print("Starting up...")  # json and pathlib not loaded yet
 
-   data = json.loads('{"key": "value"}')  # json gets loads here
-   now = datetime()  # datetime loads here
+   data = json.loads('{"key": "value"}')  # json loads here
+   p = Path(".")  # pathlib loads here
 
 This mechanism is particularly useful for applications that import many
 modules at the top level but may only use a subset of them in any given run.
@@ -189,9 +192,9 @@ raise :exc:`SyntaxError`).
 ----------------------------------------
 
 A new :term:`immutable` type, :class:`frozendict`, is added to the :mod:`builtins` module.
-It does not allow modification after creation. A ``frozendict`` is not a subclass of ``dict``;
-it inherits directly from ``object``. A ``frozendict`` is :term:`hashable`
-as long as all of its keys and values are hashable. A ``frozendict`` preserves
+It does not allow modification after creation. A :class:`!frozendict` is not a subclass of ``dict``;
+it inherits directly from ``object``. A :class:`!frozendict` is :term:`hashable`
+as long as all of its keys and values are hashable. A :class:`!frozendict` preserves
 insertion order, but comparison does not take order into account.
 
 For example::
@@ -1273,7 +1276,7 @@ csv
 .. _whatsnew315-jit:
 
 Upgraded JIT compiler
-=====================
+---------------------
 
 Results from the `pyperformance <https://github.com/python/pyperformance>`__
 benchmark suite report
@@ -1438,6 +1441,8 @@ threading
 typing
 ------
 
+.. _whatsnew315-typeform:
+
 * :pep:`747`: Add :data:`~typing.TypeForm`, a new special form for annotating
   values that are themselves type expressions.
   ``TypeForm[T]`` means "a type form object describing ``T`` (or a type
@@ -1636,7 +1641,7 @@ New features
   and :c:data:`Py_mod_abi`.
   (Contributed by Petr Viktorin in :gh:`137210`.)
 
-.. _whatsnew315-pep782:
+.. _whatsnew315-pybyteswriter:
 
 * Implement :pep:`782`, the :ref:`PyBytesWriter API <pybyteswriter>`.
   Add functions: