[CI][RFC] Replace black-jupyter with ruff-format (#37210)

Co-authored-by: Alison Shao <a.shao@wustl.edu>

test/manual/lora/test_lora_backend.py

@@ -30,7 +30,6 @@ from sglang.test.test_utils import CustomTestCase, is_in_ci
 
 
 class TestLoRABackend(CustomTestCase):
-
     def _run_backend_on_model_cases(self, model_cases: List[LoRAModelCase]):
         for model_case in model_cases:
             # If skip_long_prompt is True, filter out prompts longer than 1000 characters

test/manual/lora/test_lora_cuda_graph.py

@@ -44,7 +44,6 @@ TEST_CUDA_GRAPH_PADDING_PROMPTS = [
 
 
 class TestLoRACudaGraph(CustomTestCase):
-
     def _run_without_cuda_graph_on_model_cases(self, model_cases: List[LoRAModelCase]):
         # Since we have already enabled CUDA graph by default in other lora tests,
         # we only need to run lora tests without CUDA graph here.

test/manual/lora/test_torch_backend.py

@@ -9,7 +9,6 @@ from sglang.test.test_utils import CustomTestCase
 
 
 class TestTorchNativeLoRABackend(CustomTestCase):
-
     device = "cpu"
 
     # set duplicate weights to test merging during prepare_lora_batch