"Jim cleaned it up and recorded it but had a dentist's appointment that afternoon (for a filling) [...]" Sometimes Wikipedia really tries to relay all of the most important information.
I think they might mean most-frequently used of that user (I think the "suggested languages" already are supposed to work like that.) But that presumably requires an account.
I would have loked to see a quotation from the parts of the standard that are referred to here: "Although few implementations support its full generality in file compilation, a strict reading of the Common Lisp specification seems to imply that writing the following should be acceptable".