Remove paginated blog pages from the sidebar

The additional pages of posts ("page2", "page3", etc.) were being
included in the sidebar incorrectly. Only the first page of most recent
posts should be linked to, all other pages should be linked from the
"older" and "newer" buttons on the blog page.

Author: agude

_includes/sidebar.html

@@ -21,7 +21,11 @@ <h1>
       {% for node in pages_list %}
         {% if node.title != null %}
           {% if node.layout == "page" %}
-            <a class="sidebar-nav-item{% if page.url == node.url %} active{% endif %}" href="{{ node.url }}">{{ node.title }}</a>
+            {% if node.url contains "page" %}
+              {% comment %} Paginated Blog pages should not be included in the sidebar. {% endcomment %}
+            {% else %}
+              <a class="sidebar-nav-item{% if page.url == node.url %} active{% endif %}" href="{{ node.url }}">{{ node.title }}</a>
+            {% endif %}
           {% endif %}
         {% endif %}
       {% endfor %}