{# templates/form/_choice_remaining.html.twig #}
{% for choice in choices %}
    {% set choice_attr = choice.attr|merge({
        'data-remaining': choice.data.remaining|default(''),
        'data-purchased': choice.data.purchased|default('')
    }) %}
    {{ block('choice_widget_option', { 'choice': choice, 'attr': choice_attr }) }}
{% endfor %}