add .isort.cfg (#378)

python/sglang/srt/models/stablelm.py

@@ -5,9 +5,6 @@ model compatible with HuggingFace weights."""
 from typing import Optional, Tuple
 
 import torch
-from sglang.srt.layers.logits_processor import LogitsProcessor
-from sglang.srt.layers.radix_attention import RadixAttention
-from sglang.srt.managers.router.model_runner import InputMetadata
 from torch import nn
 from transformers import PretrainedConfig
 from vllm.model_executor.layers.activation import SiluAndMul
@@ -30,6 +27,10 @@ from vllm.model_executor.weight_utils import (
     hf_model_weights_iterator,
 )
 
+from sglang.srt.layers.logits_processor import LogitsProcessor
+from sglang.srt.layers.radix_attention import RadixAttention
+from sglang.srt.managers.router.model_runner import InputMetadata
+
 
 class StablelmMLP(nn.Module):
     def __init__(