class="listitem">
          Besides that, checking self-intersections is made faster.
        </li>
<li class="listitem">
          Intersections now avoid outputting duplicate points. So they output the
          minimal set.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Additional algorithms</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
          covered_by: within is defined as "within, not on boundary". 