anchor.diff:            <td><%= meter.meter_type.humanize %></td>
             <td>
               <div class="btn-group">
  -              <%= link_to 'Edit', edit_school_meter_path(@school, meter), class: 'btn btn-warning' %>
  -              <%= link_to 'Deactivate', deactivate_school_meter_path(@school, meter), method: :put, class: 'btn btn-secondary' %>
  +              <%= link_to 'Edit', edit_school_meter_path(@school, meter), class: 'btn btn-sm btn-warning' %>
  +              <%= link_to 'Deactivate', deactivate_school_meter_path(@school, meter), method: :put, class: 'btn btn-sm btn-secondary' %>
               </div>
             </td>
           </tr>
  
positive.code:   <% end %>
  </table>
  
  <h2>New meter</h2>
  
  <%= render 'form', school: @school, meter: @new_meter %>
  
negative.code:           <td><%= meter.meter_type.humanize %></td>
            <td>
              <div class="btn-group">
                <%= link_to 'Delete', school_meter_path(@school, meter), method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-sm btn-danger' %>
                <%= link_to 'Activate', activate_school_meter_path(@school, meter), method: :put, class: 'btn btn-sm btn-success' %>
              </div>
            </td>
          </tr>
  