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.
diff --git a/Lib/pprint.py b/Lib/pprint.py
index d7f9a28..6449868 100644
--- a/Lib/pprint.py
+++ b/Lib/pprint.py
@@ -36,7 +36,7 @@
import sys as _sys
-from StringIO import StringIO as _StringIO
+from io import StringIO as _StringIO
__all__ = ["pprint","pformat","isreadable","isrecursive","saferepr",
"PrettyPrinter"]