How to fine tune php formatter Follow

Php formatter now has so many options. And seems like preview window doesn't work on some tabs. Can anybody help me, which options I should set to have array reformatted like:

    private static $_requiredOptions = array (
        'my_email' => 'required',
        'enable_email_notifications' => 'required',
    );

    private static $_requiredOptions =
    array
    (
        'my_email' => 'required',
        'enable_email_notifications' => 'required',
    );