old_contents: #!/usr/bin/env python
  # -*- coding:utf-8 -*-
  
  import sys
  
  
  def main(argv):
      pass
  
  
  if __name__ == '__main__':
      exit(main(sys.argv))
  
new_contents: #!/usr/bin/env python
  # -*- coding:utf-8 -*-
  
  import sys
  
  
  def main(argv):
      pass
  
  
  if __name__ == '__main__':
      exit(main(sys.argv[1:]))
  
subject: Update __main__.py