use a single <thead><tr> for tables Summary

html/s24-qtypes-results.html

@@ -290,17 +290,15 @@ <h4 id='xq1-det' name='xq1-det'>Details</h4>
 <div class='l-box'>
 <h3 id='xq2' name='xq2'>2. Single selection required Yes/No</h3>
 <p>Ice-cream Process Document state.</p>
-<h4 id='xq2-sum' name='xq2-sum'>Summary</h4>
+<h4 id='xq2-sum' name='xq2-sum'>Summary (all responders)</h4>
 <p>(The results on your answers appears in bold)</p>
 <div>
 <table>
 <colgroup span='1'></colgroup>
 <colgroup span='1'></colgroup>
 <thead>
 <tr>
-<th scope='col' rowspan='2'>Choice</th>
-<th scope='colgroup'>All responders</th></tr>
-<tr>
+<th scope='col'>Choice</th>
 <th scope='col'>Results</th>
 </tr>
 </thead>