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/codeobject.c	Fri May 18 17:04:42 2007 +0000
+++ b/Objects/codeobject.c	Fri May 18 17:15:44 2007 +0000
@@ -300,7 +300,7 @@
 	PyOS_snprintf(buf, sizeof(buf),
 		      "<code object %.100s at %p, file \"%.300s\", line %d>",
 		      name, co, filename, lineno);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static PyObject *