Landing pull request 332. Appending disconnected radio or checkbox inputs and keeping checked setting Fixes #8060, #8500.

More Details:
 - https://github.com/jquery/jquery/pull/332
 - http://bugs.jquery.com/ticket/8060
 - http://bugs.jquery.com/ticket/8500

src/core.js

@@ -731,7 +731,7 @@ jQuery.extend({
 				}
 			}
 
-		// Go thorugh every key on the object,
+		// Go through every key on the object,
 		} else {
 			for ( key in elems ) {
 				value = callback( elems[ key ], key, arg );