http://api.jquery.com/one/ example needs named parameter

```
$( "#foo" ).one( "click mouseover", function() {
  alert( "The " + event.type + " event happened!" );
});
```

needs an `event` in the callback function parameter list

```
$( "#foo" ).one( "click mouseover", function(event) {
  alert( "The " + event.type + " event happened!" );
});
```

http://api.jquery.com/one/