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/Objects/funcobject.c	Fri May 18 17:04:42 2007 +0000
+++ b/Objects/funcobject.c	Fri May 18 17:15:44 2007 +0000
@@ -574,7 +574,7 @@
 static PyObject*
 func_repr(PyFunctionObject *op)
 {
-	return PyString_FromFormat("<function %s at %p>",
+	return PyUnicode_FromFormat("<function %s at %p>",
 				   PyString_AsString(op->func_name),
 				   op);
 }