Rename 'unicode' to 'str' in its tp_name field. Rename 'str' to 'str8'.
Change all occurrences of unichr to chr.
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index ee29c70..68bf703 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -4009,7 +4009,7 @@
 PyTypeObject PyString_Type = {
 	PyObject_HEAD_INIT(&PyType_Type)
 	0,
-	"str",
+	"str8",
 	sizeof(PyStringObject),
 	sizeof(char),
  	string_dealloc, 			/* tp_dealloc */