SF bug 590366:  Small typo in listsort:ParseTuple
The PyArg_ParseTuple() error string still said "msort".  Changed to "sort".
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 1ff12d2..bfa3b79 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -1619,7 +1619,7 @@
 
 	assert(self != NULL);
 	if (args != NULL) {
-		if (!PyArg_ParseTuple(args, "|O:msort", &compare))
+		if (!PyArg_ParseTuple(args, "|O:sort", &compare))
 			return NULL;
 	}
 	merge_init(&ms, compare);