old_contents: """Copyright (c) 2015 TBillTech.  All rights reserved."""
  
  __all__ = [
      'app_websocket',
      'appws_factory',
      'basic_widgets',
      'child',
      'child_error',
      'event',
      'file_finder',
      'messages',
      'node',
      'node_error',
      'root_factory',
      'temp_conf',
      'temp_index',
      'text_node']
  
new_contents: """Copyright (c) 2015 TBillTech.  All rights reserved."""
  
  __all__ = [
      'app_websocket',
      'appws_factory',
      'basic_widgets',
      'child',
      'child_error',
      'event',
      'file_finder',
      'messages',
      'element',
      'node_error',
      'root_factory',
      'temp_conf',
      'temp_index',
      'text_node']
  
subject: change node.py to element.py