code: def format_tasks(tasks):
    
    return ['%d : %s (%s)' % (task.key.id(),
                              task.description,
                              ('done' if task.done
                               else 'created %s' % task.created))
            for task in tasks]
docs: Converts a list of tasks to a list of string representations.
  
    Args:
      tasks: A list of the tasks to convert.
    Returns:
      A list of string formatted tasks.