increment docs.js version to force browser refresh.

  var devsite = <?cs if:devsite ?>true<?cs else ?>false<?cs /if ?>;

  var useUpdatedTemplates = <?cs if:useUpdatedTemplates ?>true<?cs else ?>false<?cs /if ?>;

</script>

<script src="<?cs var:toroot ?>assets/js/docs.js?v=18" type="text/javascript"></script>

<script src="<?cs var:toroot ?>assets/js/docs.js?v=19" type="text/javascript"></script>

<?cs if:helpoutsWidget ?>

<script type="text/javascript" src="https://helpouts.google.com/ps/res/embed.js" defer async