This docstring has drifted since python2: https://github.com/python/cpython/blob/ca079a3ea30098aff3197c559a0e32d42dda6d84/Lib/encodings/__init__.py#L68

* Add -X utf8 command line option, PYTHONUTF8 environment variable
  and a new sys.flags.utf8_mode flag.
* If the LC_CTYPE locale is "C" at startup: enable automatically the
  UTF-8 mode.
* Add _winapi.GetACP(). encodings._alias_mbcs() now calls
  _winapi.GetACP() to get the ANSI code page
* locale.getpreferredencoding() now returns 'UTF-8' in the UTF-8
  mode. As a side effect, open() now uses the UTF-8 encoding by
  default in this mode.
* Py_DecodeLocale() and Py_EncodeLocale() now use the UTF-8 encoding
  in the UTF-8 Mode.
* Update subprocess._args_from_interpreter_flags() to handle -X utf8
* Skip some tests relying on the current locale if the UTF-8 mode is
  enabled.
* Add test_utf8mode.py.
* _Py_DecodeUTF8_surrogateescape() gets a new optional parameter to
  return also the length (number of wide characters).
* pymain_get_global_config() and pymain_set_global_config() now
  always copy flag values, rather than only copying if the new value
  is greater than the old value.

Add also a newline for readability in normalize_encoding().

Most fixes to Doc/ and Lib/ directories by Ville Skyttä.

Permission was validated prior to adding these markings.

This changes the equivalent functions listed for the Base-64, hex and Quoted-
Printable codecs to reflect the functions actually used. Also mention and
test the "quotetabs" setting for Quoted-Printable encoding.

Based on patch by Martin Panter.

Patch by Berker Peksag.

(Windows code page 65001, Microsoft UTF-8).

Also updated the docs and added the aliases mentioned by the
references.

Also updated the docs and added the aliases mentioned by the
references.

str.encode, bytes.decode and bytearray.decode now use an
internal API to throw LookupError for known non-text encodings,
rather than attempting the encoding or decoding operation and
then throwing a TypeError for an unexpected output type.

The latter mechanism remains in place for third party non-text
encodings.

Backported changeset d68df99d7a57.

The codecs themselves were restored in Python 3.2, this
completes the restoration by adding back the convenience
aliases.

These aliases were originally left out due to confusing
errors when attempting to use them with the text encoding
specific convenience methods. Python 3.4 includes several
improvements to those errors, thus permitting the aliases
to be restored as well.

str.encode, bytes.decode and bytearray.decode now use an
internal API to throw LookupError for known non-text encodings,
rather than attempting the encoding or decoding operation and
then throwing a TypeError for an unexpected output type.

The latter mechanism remains in place for third party non-text
encodings.

ModuleNotFoundError.

cp037, cp500 and iso8859_1 codecs

Patch by Serhiy Storchaka.

the codec aliases. They are still accessible via codecs.lookup().

#7475: add (un)transform method to bytes/bytearray and str, add back codecs that can be used with them from Python 2.

svn+ssh://pythondev@svn.python.org/python/branches/release27-maint

........
  r83198 | victor.stinner | 2010-07-28 03:39:45 +0200 (mer., 28 juil. 2010) | 3 lines

  Issue #6213: Implement getstate() and setstate() methods of utf-8-sig and
  utf-16 incremental encoders.
........