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

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

Author: pre-commit-ci[bot]

src/xdist/scheduler/isoscope.py

@@ -47,7 +47,9 @@
 import enum
 from math import ceil
 import random
-from typing import cast, List, Tuple
+from typing import cast
+from typing import List
+from typing import Tuple
 from typing import TYPE_CHECKING
 
 import pytest