options.html in kramdown-2.3.1

- old
+ new

@@ -8,10 +8,10 @@
 
 <div>
   <p>some <span><em>para</em></span></p>
 </div>
 
-<p>Some text<sup id="fnref:ab" role="doc-noteref"><a href="#fn:ab" class="footnote">10</a></sup>.</p>
+<p>Some text<sup id="fnref:ab" role="doc-noteref"><a href="#fn:ab" class="footnote" rel="footnote">10</a></sup>.</p>
 
 <div class="footnotes" role="doc-endnotes">
   <ol start="10">
     <li id="fn:ab" role="doc-endnote">
       <p>Some text. <a href="#fnref:ab" class="reversefootnote" role="doc-backlink">&#8617;</a></p>