fix spacing

Author: eoneruw

students/eoner/lesson03/slice_lab.py

@@ -4,8 +4,6 @@
 # with the elements reversed (just with slicing).
 # with the last third, then first third, then the middle third in the new order.
 
-
-
 # with the first and last items exchanged.
 def exchange_first_last(seq):
     return seq[-1:] + seq[1:-1] + seq[0:1]
@@ -57,7 +55,4 @@ def last_first_middle_third(seq):
     assert last_first_middle_third((1,2,3,4,5,6,7,8,9,10)) == (8, 9, 10, 1, 2, 3, 4, 5, 6, 7)
     assert last_first_middle_third([1,2,3,4,5,6,7,8,9,10]) == [8, 9, 10, 1, 2, 3, 4, 5, 6, 7]
 
-
-
-
     print("Tests Passed!!!")