[NFC] polish colossalai/kernel/cuda_native/csrc/moe_cuda.cpp code style (#942)

colossalai/kernel/cuda_native/csrc/moe_cuda.cpp

@@ -15,10 +15,10 @@ torch::Tensor moe_combine_cuda_forward(int s, int e, int c, int h,
                                        torch::Tensor logits, torch::Tensor mask,
                                        torch::Tensor dest_idx);
 
-std::vector<torch::Tensor>
-moe_combine_cuda_backward(int s, int e, int c, int h, torch::Tensor tokens_grad,
-                          torch::Tensor expert_tokens, torch::Tensor logits,
-                          torch::Tensor mask, torch::Tensor dest_idx);
+std::vector<torch::Tensor> moe_combine_cuda_backward(
+    int s, int e, int c, int h, torch::Tensor tokens_grad,
+    torch::Tensor expert_tokens, torch::Tensor logits, torch::Tensor mask,
+    torch::Tensor dest_idx);
 
 torch::Tensor cumsum_sub_one_in_dim0(torch::Tensor mask);
 
@@ -33,7 +33,6 @@ torch::Tensor cumsum_sub_one_in_dim0(torch::Tensor mask);
 torch::Tensor moe_dispatch_forward(int s, int ec, int h,
                                    torch::Tensor batch_tokens,
                                    torch::Tensor mask, torch::Tensor dest_idx) {
-
   CHECK_INPUT(batch_tokens);
   CHECK_CUDA(mask);
   CHECK_CUDA(dest_idx);
@@ -45,7 +44,6 @@ torch::Tensor moe_dispatch_backward(int s, int ec, int h,
                                     torch::Tensor expert_grad,
                                     torch::Tensor mask,
                                     torch::Tensor dest_idx) {
-
   CHECK_INPUT(expert_grad);
   CHECK_CUDA(mask);
   CHECK_CUDA(dest_idx);
@@ -57,7 +55,6 @@ torch::Tensor moe_combine_forward(int s, int e, int c, int h,
                                   torch::Tensor expert_tokens,
                                   torch::Tensor logits, torch::Tensor mask,
                                   torch::Tensor dest_idx) {
-
   CHECK_INPUT(expert_tokens);
   CHECK_INPUT(logits);
   CHECK_CUDA(mask);
@@ -67,11 +64,12 @@ torch::Tensor moe_combine_forward(int s, int e, int c, int h,
                                   dest_idx);
 }
 
-std::vector<torch::Tensor>
-moe_combine_backward(int s, int e, int c, int h, torch::Tensor tokens_grad,
-                     torch::Tensor expert_tokens, torch::Tensor logits,
-                     torch::Tensor mask, torch::Tensor dest_idx) {
-
+std::vector<torch::Tensor> moe_combine_backward(int s, int e, int c, int h,
+                                                torch::Tensor tokens_grad,
+                                                torch::Tensor expert_tokens,
+                                                torch::Tensor logits,
+                                                torch::Tensor mask,
+                                                torch::Tensor dest_idx) {
   CHECK_INPUT(tokens_grad);
   CHECK_INPUT(logits);
   CHECK_CUDA(mask);