 content="{{ tag }}" property="article:tag">
          {% endfor %}
        {% endif %}
        <meta name="twitter:card" content="summary">
        <meta name="twitter:site" content="@{{ site.share.twitter_username }}">
        <meta name="twitter:creator" content="@{{ site.share.twitter_username }}">
        {% if page.title %}
          <meta name="twitter:title" content="{{ page.title }}">
        {% else %}
          <meta name="twitter:title" content="{{ site.title }}">
        {% endif %}
        {% 