{% assign image_url = "favicon@4x.png" | relative_url %} {% capture desc %}{% if page.about.seo.description %}{{ page.about.seo.description }}{% else %}{{ site.description }}{% endif %}{% endcapture %} {% capture title %}{{ site.title_name }}{% unless page.about.title %}: {{ site.tagline }}{% endunless %}{% endcapture %} {% if image_url %} {% endif %} {% if desc %} {% endif %}