Improve autoscrolling.
Improve autoscrolling.

Change autoscrolling so that when more than a page of text is
printed at once, it doesn't autoscroll past it; the most it
will scroll is to the point where the new text is at the top.

emoron/jquery-turtle,emoron/jquery-turtle,PencilCode/jquery-turtle,PencilCode/jquery-turtle,margmax/turtle,margmax/turtle