anchor.diff:      <td class="panel">
           20. At <em>each</em> computer
           enter the <span class="kata_id_input">&nbsp;3AF65A&nbsp;</span> id
  -        and click <div id="start_coding" class="button">start</div>
  +        and click <button id="start_coding"type="button">start</button>
       </td>
     </tr>
   
  
positive.code: <table data-width="800">
    <tr>
      <td class="panel">
          10. Click <div id="setup" class="button">setup</div>,
          choose a <div class="button">language</div>
          and an <div class="button">exercise</div>,<br/>
          &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; click <div id="ok" class="button">ok</div>.
          You'll get an id, e.g.,
          <span class='kata_id_input'>&nbsp;3AF65A&nbsp;</span>
      </td>
  
negative.code:   <tr>
      <td class="panel">
          50. When time is up use the
          <button id="review_coding" type="button">review</button> dashboard
          to review everyones<br/>
          &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; code and choose what aspects to focus
          on improving in the next iteration.
  