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

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

Author: pre-commit-ci[bot]

tests/conftest.py

@@ -23,10 +23,12 @@
 if os.name != "nt":
     HistoryManager._max_inst = 1
 
+
 @pytest.fixture(scope="session", autouse=True)
 def do_something(request):
     gc.collect()
 
+
 try:
     import resource
 except ImportError: