another spot...

public/js/main.js

@@ -13,6 +13,6 @@
         js.setAttribute("async", true);
         js.onload = function() { hljs.initHighlight(); };
         js.setAttribute("src", "https://d2xxklvztqk0jd.cloudfront.net/js/highlight.js");
-        document.getElementsByTagName('script')[0].parentNode.insertBefore(js, t);
+        var t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(js, t);
     }
 })(window);