/**
  * Outputs the object as plain text.
  * @param HISTORY_ITEM $obj
  * @access private
  */
 protected function _display_as_plain_text($obj)
 {
     $creator = $obj->creator();
     echo $this->line(ucfirst($obj->kind_as_text()) . ' by ' . $creator->title_as_plain_text() . ' - ' . $this->time($obj->time_created));
     echo $this->line($this->sep());
     if (!$obj->description && !$obj->system_description) {
         switch ($obj->kind) {
             case History_item_created:
                 echo $this->line('Created.');
                 break;
             case History_item_deleted:
                 echo $this->line('Deleted.');
                 break;
         }
     } else {
         if ($obj->description) {
             echo $this->line($obj->description_as_plain_text());
         }
         echo $obj->system_description_as_plain_text();
     }
 }