Cluin!?!?..." Don't forget the quotation marks around the URL you want to link to. Won't work without those."

No, No, No! In 10 years of doing this, I have never, never, never used quotation marks around the URL

from this page

"In links, the quotation marks around the URL are optional, but they must be a matched set: Either a double quote ("), single quote ('), or no quote at all directly before and again after the URL."

To make that link, I did NOT use quotation marks! Adding them expands your chances of making an error by NOT having a matched set, and it works perfectly well without.