anchor.diff:  
       <td class='action'>
         <% if challenge.submissions_page %>
  -        <%= link_to challenge_leaderboard_path(
  -              entry.challenge, entry.submission_id), class: 'btn btn-secondary' do %>
  -          <i class="fa fa-arrows-alt" aria-hidden="true"></i>
  +        <%= link_to challenge_submission_path(
  +              submission.challenge_id, submission.id),
  +              class: 'btn btn-secondary' do %>
  +                <i class="fa fa-arrows-alt" aria-hidden="true"></i>
           <% end %>
         <% end %>
       </td>
  -    
  +
     </tr>
   <% end %>
  
positive.code:     <% end %>
  
      <td class="score">
        <strong><%= submission.score %></strong>
      </td>
  
      <% if cols.include?(:score_secondary) %>
        <td class="score">
          <strong><%= submission.score_secondary %></strong>
        </td>
      <% end %>
  
      <td class="entries">
        <%= submission.grading_status %>
        <% if policy(submission).destroy? %>
          <p class='status active'>
            <%= link_to 'delete',
                  challenge_submission_path(
                    submission.challenge,submission),
                  method: :delete,
                  data: {confirm: 'Are you sure?'} %>
          </p>
        <% end %>
      </td>
  
      <td class="last-submission">
        <%= submission.created_at.strftime("%a, %e %b %Y %R") %>
  
negative.code: <% submissions.each do |submission| %>
    <tr id="submission-<%= submission.id %>" class='submission-row'>
      <td></td>
      <td></td>
      <td class='change'></td>
      <td></td>
  
      <td class="participant">
        <div class="user-link">
  