bpo-45449: add note about PEP 585 in collections.abc's documentation (GH-29047)

FFY00 · ambv · web-flow · commit 7bafa0cf5862 · 2021-10-19T20:18:50.000+02:00
Signed-off-by: Filipe Laíns &lt;lains@riseup.net&gt;

Co-authored-by: Łukasz Langa &lt;lukasz@langa.pl&gt;
diff --git a/Doc/library/collections.abc.rst b/Doc/library/collections.abc.rst
@@ -104,6 +104,9 @@ example, knowing that a class supplies ``__getitem__``, ``__len__``, and
 ``__iter__`` is insufficient for distinguishing a :class:`Sequence` from
 a :class:`Mapping`.
 
+.. versionadded:: 3.9
+   These abstract classes now support ``[]``. See :ref:`types-genericalias`
+   and :pep:`585`.
 
 .. _collections-abstract-base-classes:
 
diff --git a/Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst b/Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst
@@ -0,0 +1 @@
+Add note about :pep:`585` in :mod:`collections.abc`.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Add note about :pep:`585` in :mod:`collections.abc`.