::First, never say "this is my last comment" because it rarely is. There's really no need to... if you're done commenting, just don't comment any more. No need for a parting shot. And if (like so many do) you re-enter the discussion, you re-enter it looking a little silly. We all look silly sometimes accidentally. There's really no need to do it on purpose. At any rate, to answer your question, while I know of no policy that prefers one way or another, I see no need to offer two links where one will do. –