input: Write a python function to sort a given list of integers in ascending order.
  assert sort([9, 8, 7, 6, 5, 4, 3, 2, 1]) == [1, 2, 3, 4, 5, 6, 7, 8, 9]
  assert sort([5, 3, 8, 6, 2, 7, 4, 1]) == [1, 2, 3, 4, 5, 6, 7, 8]
  assert sort([10, 9, 8, 7, 6, 5, 4, 3, 2, 1]) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
output: def sort(arr):
      return sorted(arr)