[docs] add a todo-review note to pct doc; I think there's something not correct there.
[docs] add a todo-review note to pct doc; I think there's something not correct there.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@26126 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot