anchor.diff:  
   <tbody>
     <% @users.each do |user| %>
  -    <tr>
  +    <tr data-active="<%= user.active? %>">
         <td><%= image_tag gravatar_url(user.email), width: '100'%></td>
         <td><%= user.name %></td>
         <td><%= user.email %></td>
         <td><%= user.role %></td>
         <td>
           <% if user.active? %>
  -        <i class="icon-ok">
  +          &#9733;
           <% end %>
         <td>
           <% if policy(user).edit? %>
  
positive.code: 
  <h1><%= User.model_name.human(count: 2).capitalize %></h1>
  
  <% if UserPolicy.new(current_user, nil).edit? %>
    <p class="pull-right">
      <%= link_to User.human_attribute_name(:new), new_admin_user_path, class: 'btn btn-primary' %>
      <%= link_to 'Adresseliste', admin_users_path(format: :txt), class: 'btn' %>
    </p>
  <% end %>
  
  <table class="table">
  
negative.code: </table>
  
  
  <%= content_for :document_ready do %>
  <script>
    $(function() {
      $("#toggle-active-filter").change(function() {
        $("tr[data-active=false").toggle();
      });
    })
  </script>
  <% end %>