Fix duplicate end tag.

Doc/tools/sphinxext/indexcontent.html

@@ -4,7 +4,7 @@
   <table class="contentstable" align="center"><tr>
     <td width="50%">
       <p class="biglink"><a class="biglink" href="{{ pathto("whatsnew/" + version) }}">What's new in Python {{ version }}?</a><br/>
-         <span class="linkdescr">or <a href="{{ pathto("whatsnew/index") }}">all "What's new" documents</a> since 2.0</span></span></p>
+         <span class="linkdescr">or <a href="{{ pathto("whatsnew/index") }}">all "What's new" documents</a> since 2.0</span></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("tutorial/index") }}">Tutorial</a><br/>
          <span class="linkdescr">start here</span></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("library/index") }}">Library Reference</a><br/>