(let ((end (- (length (trailing-argument msg)) 1)))
;; end has been as low as 7
(when (< end 8)
- (warn "End is less than 8: `$A'." msg))
+ (warn "End is less than 8: `~A'." msg))
(output-event msg :action (first (arguments msg))
(subseq (trailing-argument msg) (min 8 end)
(- (length (trailing-argument msg)) 1)))))