Close #13247: Add cp65001 codec, the Windows UTF-8 (CP_UTF8)
diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst
index 6ae8315..1ee9c1b 100644
--- a/Doc/whatsnew/3.3.rst
+++ b/Doc/whatsnew/3.3.rst
@@ -225,6 +225,11 @@
:mod:`~encodings.mbcs` codec is now supporting all error handlers, instead of
only ``replace`` to encode and ``ignore`` to decode.
+A new Windows-only codec has been added: ``cp65001`` (:issue:`13247`). It is
+the Windows code page 65001 (Windows UTF-8, ``CP_UTF8``). For example, it is
+used by ``sys.stdout`` if the console output code page is set to cp65001 (e.g.
+using ``chcp 65001`` command).
+
Multibyte CJK decoders now resynchronize faster. They only ignore the first
byte of an invalid byte sequence. For example, ``b'\xff\n'.decode('gb2312',
'replace')`` now returns a ``\n`` after the replacement character.