{%- if next %}
  <h4>» {{ _('Next topic') }}</h4>
  <p class="topless"><a href="{{ next.link|e }}"
                        title="{{ _('next chapter') }}">{{ next.title }}</a></p>
{%- endif %}
{%- if prev %}
  <h4>« {{ _('Previous topic') }}</h4>
  <p class="topless"><a href="{{ prev.link|e }}"
                        title="{{ _('previous chapter') }}">{{ prev.title }}</a></p>
{%- endif %}