anchor.diff:      <tr>
         <td><%= member.user.name %></td>
         <td><%= member.user.fullname %></td>
  -      <td>
  -        <% if !member.duty.nil? %>
  -          <%= member.duty %>
  -        <% else %>
  -          <%= 'No duty yet!' %>
  -        <% end %>
  -      </td>
  +      <!--<td> -->
  +        <% #if !member.duty.nil? %>
  +          <%#= member.duty %>
  +        <% #else %>
  +          <%#= 'No duty yet!' %>
  +        <% #end %>
  +      <!--</td> -->
         <td><%= member.user.email %></td>
         
         <% if @teammate_review_allowed %>
  
positive.code:                 remove_participant_student_teams_path(student_id: @student.id, team_id: @student.team.id) %>
    <% end %>
  
  <% if @student.team != nil %>
    <h2>Team-member role (duty)</h2>
  
    <%=form_tag :controller=>'participants', :action=>'update_duties', :student_id=>@student.id do %>
  
negative.code:   <tr>
      <th class="head">Username</th>
      <th class="head">Full Name</th>
      <!--<th class="head">Team-member role (duty)</th>-->
      <th class="head">Email Address</th>
      <% if @teammate_review_allowed %>
        <th class="head">Action</th>
  