Fix broken cases for AlignDoubleArrowFixer

It would be nice to add a test like
```php
    "bazab" => b(array(
        1 => 2,
        3     => 4,
        5 => [
            6 => 7,
            8     => 9,
        ],
    )),
```

You skipped content inside `b(...)` call, so it would be great to test is it aligned as well ;)