Fixup typo in comment block.

Fix a couple of typos in the comment block.

public/index.php

@@ -57,10 +57,10 @@ $app = require_once __DIR__.'/../start.php';
 | Run The Application
 |--------------------------------------------------------------------------
 |
-| Once we have the application, we can simple call the run method,
+| Once we have the application, we can simply call the run method,
 | which will execute the request and send the response back to
 | the client's browser allowing them to enjoy the creative
-| this wonderful applications we have created for them.
+| and wonderful applications we have created for them.
 |
 */