input: Write a function to reverse a given list. The function should return the reversed list.
  def reverse_list(input_list):
      return input_list[::-1]
  assert reverse_list([1, 2, 3, 4, 5]) == [5, 4, 3, 2, 1]
output: def reverse_list(input_list):
      return input_list[::-1]