Merge branch 'main' into privatize-smtpd

Doc/whatsnew/3.12.rst

@@ -241,6 +241,12 @@ Changes in the Python API
   select from a larger range than ``randrange(10**25)``.
   (Originally suggested by Serhiy Storchaka gh-86388.)
 
+* :class:`argparse.ArgumentParser` changed encoding and error handler
+  for reading arguments from file (e.g. ``fromfile_prefix_chars`` option)
+  from default text encoding (e.g. :func:`locale.getpreferredencoding(False) <locale.getpreferredencoding>`)
+  to :term:`filesystem encoding and error handler`.
+  Argument files should be encoded in UTF-8 instead of ANSI Codepage on Windows.
+
 * Removed the strictly synchronous ``smtpd`` module, deprecated in Python 3.4.7
   and 3.5.4.  A recommended replacement is the
   :keyword:`async`/:keyword:`await`-based aiosmtpd_ PyPI module.