old_contents: #!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  
  def foo():
  	print 'fooo'
  
  
  if __name__ == '__main__':
  	foo()
  
  	
new_contents: #!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  
  def foo():
  	print 'foo'
  
  
  if __name__ == '__main__':
  	foo()
  
  
subject: Update foo.py