input: Write a function to optimize the given Python program that prints each number in the list on a new line. The function should return the optimized version of the program. If the input list is empty, the function should return an empty string.
  
  assert optimize_print([1, 2, 3, 4, 5, 6])=='print(*numbers, sep=\'\\n\')'
  assert optimize_print([])==''
output: def optimize_print(numbers):
      if not numbers:
          return ''
      return f'print(*numbers, sep=\'\\n\')'