DRY up archives by using an include

_includes/post-single.html

@@ -0,0 +1,8 @@
+<article itemscope itemtype="http://schema.org/CreativeWork">
+  {% if post.link %}
+    <h2 class="link-post" itemprop="headline"><a href="{{ absurl }}{{ post.url }}">{{ post.title | markdownify | remove: "<p>" | remove: "</p>" }}</a> <a href="{{ post.link }}" target="_blank"><i class="fa fa-link"></i></a></h2>
+  {% else %}
+    <h2 itemprop="headline"><a href="{{ absurl }}{{ post.url }}">{{ post.title | markdownify | remove: "<p>" | remove: "</p>" }}</a></h2>
+    {% if post.excerpt %}<p itemprop="description">{{ post.excerpt | strip_html | truncate: 160 }}</p>{% endif %}
+  {% endif %}
+</article>