Some style nits. Also clarify in the docstrings what __sizeof__ does.
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 0216a85..796e8cb 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2437,7 +2437,7 @@
PyDoc_STRVAR(reversed_doc,
"L.__reversed__() -- return a reverse iterator over the list");
PyDoc_STRVAR(sizeof_doc,
-"L.__sizeof__() -- size of L in bytes");
+"L.__sizeof__() -- size of L in memory, in bytes");
PyDoc_STRVAR(append_doc,
"L.append(object) -- append object to end");
PyDoc_STRVAR(extend_doc,