Suppress tabindex for file upload / markdown help on github comment #tampermonkey

github-tabindex.js

// ==UserScript==
// @name         Suppress tabindex for file upload / markdown help on github comment
// @namespace    http://tampermonkey.net/
// @version      0.3
// @match        https://github.com/*
// @require      http://code.jquery.com/jquery-1.11.0.min.js
// ==/UserScript==

(function() {
    'use strict';
    var $ = window.jQuery;
    function disableTab(el) { el.prop({tabindex: -1}); }
    disableTab($("div.discussion-timeline-actions a.tabnav-extra"));
    disableTab($("div.discussion-timeline-actions span.default > input.manual-file-chooser"));
    $("#discussion_bucket a.tabnav-extra").each(function() { disableTab($( this )); });
    $("#discussion_bucket span.default > input.manual-file-chooser").each(function() { disableTab($( this )); });
})();