display-tags.liquid

  {% if product.tags.size > 0 %}
    <div class="product-single__tags">
      <p>Tags:
        {% for tag in product.tags %}
        {% assign tag_coll = '/collections/all/' | append: tag %}
          {{ tag | capitalize | link_to: tag_coll }}{% unless forloop.last %},{% endunless %}
        {% endfor %}
      </p>
    </div>
  {% endif %}