test for primspec for concat (#77)
diff --git a/torch/autograd/_functions/tensor.py b/torch/autograd/_functions/tensor.py
index 1c214ba..5738c7f 100644
--- a/torch/autograd/_functions/tensor.py
+++ b/torch/autograd/_functions/tensor.py
@@ -321,7 +321,7 @@
 
     @staticmethod
     def primspec(dim, *inputs):
-        return torch.toffee.op("Concat", inputs, axis=dim)
+        return torch.toffee.op("Concat", *inputs, axis=dim)
 
     @staticmethod
     def forward(ctx, dim, *inputs):