anchor.diff:  
     //-----------------------------------------
     // refresh navigator
  -  //       avatar [<] event-index [>]
  +  //       avatar? [<] event-index [>]
     //-----------------------------------------
   
     const refreshNavigator = () => {
  
positive.code:       filename: "<%= @filename %>"
    };
  
    // after refresh() has been called param also contains param.events
  
    cd.setReviewDialogData = (id, avatarName, wasIndex, nowIndex, filename) => {
      param = {
  
negative.code: $(() => {
  
    //---------------------------------------------------------------------
    // This review page is used in kata/edit and dashboard/show
    // when a traffic-light is clicked.
    // The [resume] [revert] buttons are only on kata/edit.
    //---------------------------------------------------------------------
  
    const inTestPage = () => {
      return $('#kata-page').length != 0;
    };
  
    // after refresh() has been called param also contains param.events
    let param = {
              id: "<%= @id %>",
      avatarName: "<%= @avatar_name %>",
  