old_contents: #
  # -*- coding: utf-8 -*-
  from .cmd2 import __version__, Cmd, CmdResult, Statement, categorize
  from .cmd2 import with_argument_list, with_argparser, with_argparser_and_unknown_args, with_category
  
new_contents: #
  # -*- coding: utf-8 -*-
  from .cmd2 import __version__, Cmd, CmdResult, Statement, EmptyStatement, categorize
  from .cmd2 import with_argument_list, with_argparser, with_argparser_and_unknown_args, with_category
  
subject: Add EmptyStatement exception to default imports