input: Write a function to optimize the given Python program that prints each element of a list on a new line. The function should modify the program to use a more efficient method if possible. If the given list is empty, the program should handle this case gracefully.
  assert optimize_program([1, 2, 3, 4, 5, 6])==[1, 2, 3, 4, 5, 6]
  assert optimize_program([])==[]
output: def optimize_program(lst):
      return lst