nextcloud-desktop/doc/_shared_assets/themes/nextcloud_com/relations.html

{# Switch to icon instead of text in `sm` view size for BS3 only. #}
{%- if prev or next %}
<ul class="prevnext-title list-unstyled list-inline">
{%- endif %}
{%- if prev %}
  <li class="prev">
    <a href="{{ prev.link|e }}" title="{{ _('Previous Chapter: ') + prev.title|striptags }}">
      {%- if theme_bootstrap_version == "3" -%}<span class="glyphicon glyphicon-chevron-left visible-sm"></span>{%- endif -%}
      <span class="hidden-sm">{{ "&laquo;"|safe }} {{ prev.title|striptags }}</span>
    </a>
  </li>
{%- endif %}
{%- if next %}
  <li class="next">
    <a href="{{ next.link|e }}" title="{{ _('Next Chapter: ') + next.title|striptags }}">
      {%- if theme_bootstrap_version == "3" -%}<span class="glyphicon glyphicon-chevron-right visible-sm"></span>{%- endif -%}
      <span class="hidden-sm">{{ next.title|striptags }} {{ "&raquo;"|safe }}</span>
    </a>
  </li>
{%- endif %}
{%- if prev or next %}
</ul>
{%- endif %}