Bitfinex tested

docs/_includes/toc.html

@@ -4,7 +4,7 @@
 $( document ).ready(function() {
   // Handler for .ready() called.
 
-$('#toc').toc({ minimumHeaders: 0, listType: 'ul', showSpeed: 0, headers: 'h2,h3,h4' });
+$('#toc').toc({ minimumHeaders: 0, listType: 'ul', showSpeed: 0, headers: 'h2,h3' });
 
 /* this offset helps account for the space taken up by the floating toolbar. */
 $('#toc').on('click', 'a', function() {