input: Write a function to optimize the given Python program which prints each element of a list on a new line. The function should modify the program to use a more efficient approach for printing.
  
  Input and Output format:
  
  Function header: optimize_program(numbers)
  
  Test cases:
  assert optimize_program([1, 2, 3, 4, 5, 6]) == "numbers = [1, 2, 3, 4, 5, 6]\n\nprint(*numbers, sep='\\n')"
  assert optimize_program([9, 8, 7, 6, 5, 4, 3, 2, 1]) == "numbers = [9, 8, 7, 6, 5, 4, 3, 2, 1]\n\nprint(*numbers, sep='\\n')"
  assert optimize_program([]) == "numbers = []\n\nprint(*numbers, sep='\\n')"
  assert optimize_program([10, 20, 30, 40, 50]) == "numbers = [10, 20, 30, 40, 50]\n\nprint(*numbers, sep='\\n')"
output: def optimize_program(numbers):
      return f"numbers = {numbers}\n\nprint(*numbers, sep='\\n')"