Add functions PyUnicode_Append() and PyUnicode_AppendAndDel() that mirror PyString_Concat() and PyString_ConcatAndDel() (the name PyUnicode_Concat() was already taken). Change PyObject_Repr() to always return a unicode object. Update all repr implementations to return unicode objects. Add a function PyObject_ReprStr8() that calls PyObject_Repr() and converts the result to an 8bit string. Use PyObject_ReprStr8() where using PyObject_Repr() can't be done straightforward.

--- a/Modules/socketmodule.c	Fri May 18 17:04:42 2007 +0000
+++ b/Modules/socketmodule.c	Fri May 18 17:15:44 2007 +0000
@@ -2865,7 +2865,7 @@
 		(long)s->sock_fd, s->sock_family,
 		s->sock_type,
 		s->sock_proto);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }