github-code-view-expander.js

// ==UserScript==
// @author  	     Gerolf Seitz
// @name           Github Wide Diff.
// @description    Make the diff view as wide as the browser window.
// @include        https://github.com/*
// ==/UserScript==

(function () {

	function addJQuery(callback) {
	  var script = document.createElement("script");
	  script.setAttribute("src", "//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js");
	  script.addEventListener('load', function() {
	    var script = document.createElement("script");
	    script.textContent = "window.jQ=jQuery.noConflict(true);(" + callback.toString() + ")();";
	    document.body.appendChild(script);
	  }, false);
	  document.body.appendChild(script);
	}

	// the guts of this userscript
	function main() {	  
	  $("#js-repo-pjax-container, .frames > .frame-center").width($(document.body).width()-50);
	}

	// load jQuery and execute the main function
	addJQuery(main);
})();