Incorrect fix for multi-line array

```php
        $fields['maildigest'] = ['type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
                'default' => $CFG->defaultpreference_maildigest, ];
```

Should be:
```php
        $fields['maildigest'] = [
            'type' => PARAM_INT,
            'null' => NULL_NOT_ALLOWED,
            'default' => $CFG->defaultpreference_maildigest,
        ];
```