old_contents: def print_hello_word():
  	print('hello world!')
  
  def fib(n):
  	a, b = 0, 1
  	for i in range(n):
  		a, b = b, a + b
  		yield b
  print(list(fib(10)))
  
new_contents: def print_hello_word():
  	print('hello world!')
  
  def fib(n):
  	fibs = []
  	a, b = 0, 1
  	for i in range(n):
  		a, b = b, a + b
  		fibs.append(a)
  	return fibs
  		
  print_hello_world()
  print(list(fib(10)))
  
subject: change test.py to using lists