wallabag/src/Wallabag/AnnotationBundle/Form/EditAnnotationType.php

<?php

namespace Wallabag\AnnotationBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class EditAnnotationType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('text', null, [
                'empty_data' => '',
            ])
        ;
    }
}