anchor.diff:      <%= button_to 'Edit', edit_event_path(@event), :class => 'btn btn-primary', :method => :get %>
     <% end %>
     <%= button_to 'Back', events_path, :class => 'btn btn-success', :method => :get %>
  -</div>
  +  </div>
  
positive.code:           </div>
          <% end %>
        </div>
      </div>
    <% end %>  
    <hr>
  
    <% if @registration %>
  
negative.code:       <div class="card">
          <% sessionList.each do |session| %>
            <div class="card-header striped-outer" id="session-header-<%= session.id %>">
              <div class="row mb-0">
                <div class="col-md-5">
                  <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#session-<%= session.id %>" aria-expanded="false" aria-controls="session-<%= session.id %>">
                    <%= session.name %>: <%= session.timeslot %>
                  </button>
                </div>
                <div class="col-md-1 no-pad"></div>
                <div class="col-md-2 no-pad ">
                <span class="text-primary"><%= session.total_max_players - session.players_count %>
                  of <%= session.total_max_players %> player seats left</span></div>
  
                <% if session.gm_count == session.total_gms_needed %>
                  <% klass = 'text-primary' %>
                <% else %>
                  <% klass = 'text-danger' %>
                <% end %>
                <div class="col-md-2 no-pad"></div>
                <div class="col-md-2 no-pad"><span class="<%= klass %>"><%= session.total_gms_needed - session.gm_count %>
                  of <%= session.total_gms_needed %> GMs needed</span>
                </div>
              </div>
            </div>
  
  
            <div id="session-<%= session.id %>" class="collapse" aria-labelledby="session-header-<%= session.id %>" data-parent="#session-signup">
              <div class="card-body">
  