focusing on interactions on click prevents errors from getting copy-and-pasted

sk reports:

It is incredibly hard to copy an error message.

For this program,

(define (draw w)
  (circle (first w) "solid" "blue"))

(define (tick w)
  cond [(= 1 (length w)) w]
       [(= (first w) (second w) (rest w))]
       [(< (first w) (second w)) (cons (+ (first w) 1))
                                       (rest w)]
       [else (cons (- (first w) 1)
                   (rest w))])

(big-bang '(10 50 20 40 30)
          (to-draw draw)
          (on-tick tick))

I tried six times to copy (OS X, Chrome), and even when I had the text highlighted and pressed command-C (and the edit menu flashed), pasting always pasted back in the previous selection.

dyoo / WeScheme

focusing on interactions on click prevents errors from getting copy-and-pasted #98