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

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

jupyter_cache/cache/db.py

@@ -52,7 +52,7 @@ def get_version(path: Union[str, Path]) -> Optional[str]:
 
 
 def datetime_utcnow():
-    return lambda : datetime.datetime.now(datetime.timezone.utc)
+    return lambda: datetime.datetime.now(datetime.timezone.utc)
 
 
 @contextmanager