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

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

Author: pre-commit-ci[bot]

sorts/merge_sort.py

@@ -8,16 +8,19 @@
 For manual testing run:
 python merge_sort.py
 """
+
 from typing import Protocol, TypeVar
 
 # CHANGED: Added Comparable Protocol.
 # WHY: Merge sort is a comparison-based sorting algorithm, so it should
 # support any type of item that can be compared using the < operator,
 # not only integers.
 
+
 class Comparable(Protocol):
     def __lt__(self, other: object, /) -> bool: ...
 
+
 # CHANGED: Added a TypeVar bounded to Comparable.
 # WHY: This preserves the input element type while ensuring that the
 # elements support comparison.