SF patch# 1770008 by Christian Heimes (plus some extras).

Completely get rid of StringIO.py and cStringIO.c.

I had to fix a few tests and modules beyond what Christian did, and
invent a few conventions.  E.g. in elementtree, I chose to
write/return Unicode strings whe no encoding is given, but bytes when
an explicit encoding is given.  Also mimetools was made to always
assume binary files.

Lib/test/test_logging.py

@@ -25,7 +25,7 @@ Copyright (C) 2001-2002 Vinay Sajip. All Rights Reserved.
 """
 
 import select
-import os, sys, struct, pickle, cStringIO
+import os, sys, struct, pickle, io
 import socket, tempfile, threading, time
 import logging, logging.handlers, logging.config
 from test.test_support import run_with_locale
@@ -606,7 +606,7 @@ def test_main_inner():
     #Configure the logger for logrecv so events do not propagate beyond it.
     #The sockLogger output is buffered in memory until the end of the test,
     #and printed at the end.
-    sockOut = cStringIO.StringIO()
+    sockOut = io.StringIO()
     sockLogger = logging.getLogger("logrecv")
     sockLogger.setLevel(logging.DEBUG)
     sockhdlr = logging.StreamHandler(sockOut)