In https://bugs.webkit.org/show_bug.cgi?id=71342 Darin suggested to get rid of the + 1 and simply append "/" explicitly. That is a good idea, let's do that :)
Created attachment 113289 [details] Patch
Comment on attachment 113289 [details] Patch Clearing flags on attachment: 113289 Committed r99098: <http://trac.webkit.org/changeset/99098>
All reviewed patches have been landed. Closing bug.