trying to get subpages to work with code

tags.md

@@ -0,0 +1,8 @@
+{% for tag in site.tags %}
+    <h3>{{ tag[0] }}</h3>
+    <ul>
+        {% for post in tag[1] %}
+            <li><a href=" {{ post.url }}">{{ post.title }}</a></li>
+        {% endfor %}
+    </ul>
+{% endfor %}