source/_includes/pagination_bar.html

<p class="navigation">
  {% if paginator.next_page %}
    {% if page.title == "Blog" %}
      <span class="alignleft"><a href="/blog/page/{{ paginator.next_page }}/">« Previous Page</a></span>
    {% else %}
      <span class="alignleft"><a href="/blog/archives/{{ page.year }}/{{ page.month }}/page/{{ paginator.next_page }}/">« Previous Page</a></span>
    {% endif %}
  {% endif %}

  {% if paginator.previous_page %}
    {% if paginator.previous_page > 1 %}
      {% if page.title == "Blog" %}
        <span class="pull-right"><a href="/blog/page/{{ paginator.previous_page }}/">Next Page »</a></span>
      {% else %}
        <span class="pull-right"><a href="/blog/archives/{{ page.year }}/{{ page.month }}/page/{{ paginator.previous_page }}/">Next Page »</a></span>
      {% endif %}
    {% else %}
      {% if page.title == "Blog" %}
        <span class="pull-right"><a href="/blog/">Next Page »</a></span>
      {% else %}
        <span class="pull-right"><a href="/blog/archives/{{ page.year }}/{{ page.month }}/">Next Page »</a></span>
      {% endif %}
    {% endif %}
  {% endif %}
</p>