* Attempt to validate the value of Access-Control-Request-Headers against a list
* of headers that we allow the follow up request to send.
*
- * @param string $requestedHeaders Comma seperated list of HTTP headers
+ * @param string $requestedHeaders Comma separated list of HTTP headers
* @return bool True if all requested headers are in the list of allowed headers
*/
protected static function matchRequestedHeaders( $requestedHeaders ) {