anchor.diff:          <input name="task[attachments_attributes][][url]" type="hidden" data-bind="value: url" />
       </ul>  
       
  -    <%= f.submit nil, :class => 'btn btn-primary' %>
  +    <%= submit_tag t('submit'), :class => 'btn btn-primary form_submit task_form_submit', :onclick => "$('.task_form').submit();" %>
       <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
                 @return_url.nil? ? tasks_path : @return_url, :class => 'btn btn-default' %>
     <% end %>
  
positive.code:         <%= error_span(@task[:deadline]) %>  
        </div>
        <div class="control-group">
        <%= f.label :identity, :class => 'control-label' %>
        <div class="controls">
            <%= f.hidden_field :identity %>
            <input type="text" id="task_identity_display", class="form-control", data-autocomplete-url="<%= identities_autocomplete_path %>" value="<%= @identity_name %>">
        </div>
        <%= error_span(@task[:identity]) %>
        </div>
      <% end %>
      <% unless @task.new_record? or @for_event_template %>
  
negative.code:             <% end %>
          <% end %>
      </ul>
  
      <h4><%= t('tasks.form.links') %></h4>
      <form id="attachment_form" data-bind="submit: addAttachment">
  