anchor.diff:          <% group.memberships.each do |membership| %>
           <li><%= membership.person.fullname -%>
             <% if membership.status == 'pending' %>
  -             (<%= link_to "approve", :controller => :membership, :action => :approve_membership, :id => membership.id %>)
  +          (<%= link_to "approve", :controller => :membership, :action => :approve_membership, :id => membership.id %>)
             <% end %>
   
             <% if membership.person != @person %>
  -             (<%= link_to "remove", :controller => :membership, :action => :leave, :id => membership.id %>)
  -              <% if membership.is_administrator? %>
  -             (<%= link_to "remove administrator", :controller => :membership, :action => :remove_administrator, :id => membership.id %>)
  -              <% else %>
  -             (<%= link_to "make administrator", :controller => :membership, :action => :make_administrator, :id => membership.id %>)
  -              <% end %>
  +          (<%= link_to "remove", :controller => :membership, :action => :leave, :id => membership.id %>)
  +          <% if membership.is_administrator? %>
  +          (<%= link_to "remove administrator", :controller => :membership, :action => :remove_administrator, :id => membership.id %>)
  +          <% else %>
  +          (<%= link_to "make administrator", :controller => :membership, :action => :make_administrator, :id => membership.id %>)
  +          <% end %>
             <% end %>
           </li>
           <% end %>
  
positive.code:     <ul>
        <% @person.memberships.each do |membership| %>
        <li><%= membership.group.name %>
               (<%= link_to "leave", :controller => :membership, :action => :leave, :id => membership.id %>)
          </li>
        <% end %>
      </ul>
    </div>
  
negative.code: 
      <h3>Invite people to join one of your groups:</h3>
  
      <% if @model.group %>
          <% model_group_id = @model.group.id %>
      <% else %>
          <% model_group_id = -1 %>
      <% end %>
  
      <% form_tag :controller => "membership", :action => :invite_people do |form| %>
      <%= select("group", "id", @person.groups.to_hash, :selected => model_group_id) %>
      <p>E-mail addresses, separated by commas:</p>
      <p><%= text_area_tag "invitees" %></p>
      <p><%= submit_tag "Invite users" %></p>
  