[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

sorts/pancake_sort.py

@@ -10,6 +10,7 @@
 
 from collections.abc import MutableSequence
 
+
 def pancake_sort(arr: MutableSequence[int]) -> MutableSequence[int]:
     """Sort Array with Pancake Sort.
     :param arr: Collection containing comparable items