using super().  (See recent conversation on python-3000 with Talin
and Phillip Eby about PEP 3115 chaining rules.)

In particular, add trivial implementations of .real, .imag and .conjugate()
to both, and add .numerator and .denominator to long.
Also some small optimizations (e.g. remove long_pos in favor of long_long).

in KOI8-R.

(The previous changes to abc.py were also by him).
Put back a comment about using super() for properties
(I didn't realize this worked).

Add docstring for conjugate().
Patch by Jeffrey Yasskin.

error callback changes the bytes object in the exception the decoder might
use memory that's no longer in use. Change unicode_decode_call_errorhandler()
so that it fetches the adresses of the bytes array (start and end) from the
exception object and passes them back to the caller.

string representation for use in the XML.

Also strip out some unneeded encoding/decoding steps.

to be between str8 and str.

Reported by Joe Smith.  This makes the CYGWIN tests pass;
it's a miracle it didn't fail on other platforms.
Seems like it was accidentally dropped (maybe a merge artifact?).

encoding can only be UTF-8 now.

Unicode now.

In order to do this, I added an optional encoding argument to io.StringIO.
The toprettyxml() function returns bytes when you specify an encoding now.

Fix one of the two failing tests for minidom.

Get rid of some #ifdef'ed-out code.

Change a bunch of .assert_(X == Y) to .assertEqual(X, Y).

Fix test_aepack and test_applesingle.

Kill some dead (commented-out) code.

files, not text files.

test_shelve still fails thanks to bsddb not having been fixed.

Silence two innocuous warnings (_File and _collections).

division.  The other curses demos all work fine, so I'm more confident
that the curses library actually works. (Don't try to display
non-ASCII characters, of course.)

Can't guarantee I caught every spot.

I have no illusion that this fixes all issues with this module.

(To run these, you need to pass -uurlfetch to regrtest.py or runtests.sh.)

1. Removed "returns_unicode" attribute, associated code
   in the module to support that attribute, and all tests
   associated with it.
2. Parsed data is now returned as unicode strings.
3. Changed input tests to use io.BytesIO instead
   of StringIO, to reflect the byte processing
   nature of expat.