backlink_text.html in kramdown-2.3.1

- old
+ new

@@ -1,5 +1,5 @@
-<p>Some footnote here<sup id="fnref:fn" role="doc-noteref"><a href="#fn:fn" class="footnote">1</a></sup></p>
+<p>Some footnote here<sup id="fnref:fn" role="doc-noteref"><a href="#fn:fn" class="footnote" rel="footnote">1</a></sup></p>
 
 <div class="footnotes" role="doc-endnotes">
   <ol>
     <li id="fn:fn" role="doc-endnote">
       <p>Some text here <a href="#fnref:fn" class="reversefootnote" role="doc-backlink">text &8617; &lt;img /&gt;</a></p>