gistfile1.html

{% assign shipping_section = '' %}

{% assign blog = blogs.faq %}
{% paginate blog.articles by 100 %}
  {% for article in blog.articles %}
    {% if article.tags contains 'Shipping' %}
      {% capture shipping_section %}{{ shipping_section }}<li>{{ article.title | link_to: article.url }}</li>{% endcapture %}
    {% endif %}
  {% endfor %}
{% endpaginate %}

{% unless shipping_section == blank %}
<ul>{{ shipping_section }}</ul>
{% endif %}

{% unless shipping_section == blank %}

{{ shipping_section }}

{% endif %}

should be

{% unless shipping_section == blank %}

{{ shipping_section }}

{% endunless %}