Fix the closure in ajax.js too.

src/ajax.js

@@ -401,4 +401,4 @@ jQuery.support.ajax = !!testXHR;
 // Does this browser support crossDomain XHR requests
 jQuery.support.cors = testXHR && "withCredentials" in testXHR;
 
-})(jQuery);
\ No newline at end of file
+})( jQuery );