old_contents: 
  def show_cmd(task):
      return "executing... %s" % task.name
  
  def task_custom_display():
      return {'actions':['echo abc efg'],
              'title': show_cmd}
  
new_contents: 
  def show_cmd(task):
      return "executing... %s" % task.actions[0]
  
  def task_custom_display():
      return {'actions':['echo abc efg'],
              'title': show_cmd}
  
subject: Correct title.py