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

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

jupyter_server/services/sessions/handlers.py

@@ -168,7 +168,11 @@ async def patch(self, session_id):
                     raise web.HTTPError(400, "No such kernel: %s" % kernel_id)
                 changes["kernel_id"] = kernel_id
             elif model["kernel"].get("name") is not None:
-                custom_env_vars = model["kernel"]["env"] if "env" in model["kernel"] and accept_kernel_env_vars else {}
+                custom_env_vars = (
+                    model["kernel"]["env"]
+                    if "env" in model["kernel"] and accept_kernel_env_vars
+                    else {}
+                )
 
                 kernel_name = model["kernel"]["name"]
                 kernel_id = await sm.start_kernel_for_session(