semantics of header chunks using byte and Unicode strings.
Specifically,

append(): When the given string is a byte string, charset (whether
specified explicitly in the argument list or implicitly via the
constructor default) is the encoding of the byte string, and a
UnicodeError will be raised if the string cannot be decoded with that
charset.  If s is a Unicode string, then charset is a hint specifying
the character set of the characters in the string.  In this case, when
producing an RFC 2822 compliant header using RFC 2047 rules, the
Unicode string will be encoded using the following charsets in order:
us-ascii, the charset hint, utf-8.

__init__(): Use the global USASCII Charset instance when the charset
argument is None.  Also, clarification in the docstring.

Also, use True/False where appropriate.

Relax regular expression to handle spaces in user and group names.

    ``void (*)(PyObject *)``

isn't quite the same as

    void (*)(PyObject \*)

but I gather ``...`` is preferable stylistically in most cases than
... \*...

Python 2.1.3.  However it's required by the email tests suite, so poke
it into the encodings aliases if it's missing.  The is apparently the
approved API for doing so.

Now we can remove the hexversion shortcircuits in the test suite.

Use -b HEAD to limit output to the trunk (skip all branch revisions).

doesn't know about the ansi-x3.4-1968 charset so skip two tests that
rely on that (msg_32.txt and msg_33.txt).

some of the test values which change because of this.

filename of the current buffer.

encoding flag SHORTEST means to return the shortest encoding between
base64 and qp.  This is used for the header_enc for utf-8.  SHORTEST
isn't legal for body_enc.

Also some code cleanup:

- use True/False everywhere
- use == instead of `is' in a few places
- added _unicode() and make consistent the "is unicode" checks
- update docstrings

Closes SF bug #583248; backporting to r22-maint branch.

Closes SF bug #561822.

Integrate the "code cleanup and general bug fix patch" (SF bug #545096),
contributed by Gustavo Niemeyer.  This is the portion of that patch that
does not add new functionality.

"Merge Py Idle changes:
Rev 1.7 [Python-idle] loewis
Convert characters from the locale's encoding on output.
Reject characters outside the locale's encoding on input."

Not compatible with Python 2.2.1.  Forwardport as a SF patch.

	(cut vs. Cut etc.)
Fix Bug 613006 Ctrl-x Unix Binding Clears Selection
	(do-nothing does something :)
Leave some debugging prints behind, commented out
M EditorWindow.py
M config-keys.def
M configHandler.py

Solaris from squawking if less isn't available.  See
http://python.org/sf/612111 for details.

controversy.

project, and with assistance from Oleg Broytmann.  Specifically,
added some new tests to make sure we handle RFC 2231 encoded
parameters correctly.  Two new data files were added which contain RFC
2231 encoded parameters.

project, and with assistance from Oleg Broytmann.  Specifically,

get_param(), get_params(): Document that these methods may return
parameter values that are either strings, or 3-tuples in the case of
RFC 2231 encoded parameters.  The application should be prepared to
deal with such return values.

get_boundary(): Be prepared to deal with RFC 2231 encoded boundary
parameters.  It makes little sense to have boundaries that are
anything but ascii, so if we get back a 3-tuple from get_param() we
will decode it into ascii and let any failures percolate up.

get_content_charset(): New method which treats the charset parameter
just like the boundary parameter in get_boundary().  Note that
"get_charset()" was already taken to return the default Charset
object.

get_charsets(): Rewrite to use get_content_charset().

Will backport to 2.2