Tester.py

def bubble_sort(lst):
  for i in range(len(lst) - 1, 0 , -1):
    for current in range(0, i):
      if (lst[current+1] < lst[current]):
        temp = lst[current]
        lst[current] = lst[current+1]
        lst[current+1] = temp
  return lst
data = [18, 5, 15, 6, 15, 1]
print(bubble_sort(data))

What is the output?
Be careful of the whitespace(space,newline) in your answer.