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

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

Author: pre-commit-ci[bot]

tests/test_sorts.py

@@ -13,6 +13,7 @@
 0/1/2, ``bitonic_sort`` needs a power-of-two length, ``topological_sort`` works
 on a graph, and ``stalin_sort``/``wiggle_sort`` deliberately do not fully sort).
 """
+
 from dataclasses import dataclass
 from typing import NamedTuple
 
@@ -71,17 +72,20 @@ def test_heap_sort():
     strand_sort,
 )
 
+
 @dataclass
 class Person:
     name: str = "Bob"
     age: int = 37
     cost: float = 0.0
 
+
 class Dog(NamedTuple):
     name: str = "Fido"
     age: int = 5
     weight: float = 15.5
 
+
 CASES = (
     [],
     [1],