edit_form.html

<form 
  class="form-horizontal ${'has-errors' if c.errors or c.fieldset.errors else ''}" 
  id="group-edit" 
  action="" 
  method="post"
  xmlns:py="http://genshi.edgewall.org/"
  xmlns:xi="http://www.w3.org/2001/XInclude"
  >

 ${h.literal(c.fieldset.render())}

 <fieldset>
  <legend>Users</legend>
  <div class="control-group" py:for="user in c.fieldset.model.users">
    <label class="control-label" for="AuthorizationGroup-users_${user.name}" style="display: inline;">${user.name}</label>
    <div class="controls">
      <label class="checkbox">
        <input checked="checked" id="AuthorizationGroup-users-current"
        name="AuthorizationGroup-users-current" type="checkbox" value="${user.name}" />
      </label>
    </div>
  </div>
  <p py:if="not c.fieldset.model.users">There are no users currently in this group.</p>
 </fieldset>
 
 ${h.literal(c.fieldset2.render())}

  <br/>
  ${h.submit('save', _('Save'))}
</form>