It is highly in doubt that @Robert Cartaino used to be @rcar. Should I edit this?
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.Sign up to join this community
You can, but you don't have to. You can even remove it I think since it doesn't look very necessary (maybe a reply to a comment or small attribution).
If you want to improve that post and make it easier to understand: go ahead. Fix it. Make sure to fix all possible issues, or some reviewers may decline it for such a small change.
Also I could argue it isn't very necessary, but a small improvement is an improvement.