old_contents: PREVIOUS_VERSION = '0.20.3'
  
  
  def main():
      print PREVIOUS_VERSION
  
  
  if __name__ == "__main__":
      main()
  
  
new_contents: PREVIOUS_VERSION = '0.20.4'
  
  
  def main():
      print PREVIOUS_VERSION
  
  
  if __name__ == "__main__":
      main()
  
  
subject: Store previous version [skip ci]