Apply pre-commit formatting (isort) [skip-build]

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/test_muon_moe.py

@@ -7,7 +7,8 @@ import pytest
 import torch
 import torch.distributed as dist
 from optimizer.muon import Muon, get_default_muon_param_groups
-from torch.distributed.tensor import DTensor, Replicate, Shard, distribute_tensor
+from torch.distributed.tensor import (DTensor, Replicate, Shard,
+                                      distribute_tensor)
 from torch.profiler import ProfilerActivity, profile
 
 from .utils import ParallelDims, assert_params_equal, parallelize_llama4