input: Write a function to optimize a Python program that prints each element of a list on a new line. The optimization should eliminate the need for a for loop. The function should accept a list of integers as its input and return the optimized code as a string.
  assert optimize_code([1, 2, 3, 4, 5, 6])=='numbers = [1, 2, 3, 4, 5, 6]\nprint(*numbers, sep=\'\\n\')'
  assert optimize_code([7, 8, 9])=='numbers = [7, 8, 9]\nprint(*numbers, sep=\'\\n\')'
  assert optimize_code([])=='numbers = []\nprint(*numbers, sep=\'\\n\')'
output: def optimize_code(numbers):
      return f'numbers = {numbers}\nprint(*numbers, sep=\'\\n\')'