Core: Align code in intro.js with master

Since we're testing the factory code from intro.js on master only it's best
to have those two files almost identical.

This commit leaves only one difference between them: "jQuery Compat" vs.
"jQuery" in the second line.

Closes gh-2294

src/intro.js

@@ -15,13 +15,13 @@
 (function( global, factory ) {
 
 	if ( typeof module === "object" && typeof module.exports === "object" ) {
-		// For CommonJS and CommonJS-like environments where a proper window is present,
-		// execute the factory and get jQuery
-		// For environments that do not inherently posses a window with a document
-		// (such as Node.js), expose a jQuery-making factory as module.exports
-		// This accentuates the need for the creation of a real window
+		// For CommonJS and CommonJS-like environments where a proper `window`
+		// is present, execute the factory and get jQuery.
+		// For environments that do not have a `window` with a `document`
+		// (such as Node.js), expose a factory as module.exports.
+		// This accentuates the need for the creation of a real `window`.
 		// e.g. var jQuery = require("jquery")(window);
-		// See ticket #14549 for more info
+		// See ticket #14549 for more info.
 		module.exports = global.document ?
 			factory( global, true ) :
 			function( w ) {
@@ -37,8 +37,8 @@
 // Pass this if window is not defined yet
 }(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
 
-// Can't do this because several apps including ASP.NET trace
+// Support: Firefox 18+
+// Can't be in strict mode, several libs including ASP.NET trace
 // the stack via arguments.caller.callee and Firefox dies if
 // you try to trace through "use strict" call chains. (#13335)
-// Support: Firefox 18+
 //"use strict";