Fix lint (#2702)

Author: zhouzaida

tests/test_ops/test_conv_gradfix.py

@@ -37,6 +37,7 @@ def test_conv2d_transposed_cuda(self):
         weight = self.weight.cuda()
         res = conv_transpose2d(x, weight, None, 1, 1)
         assert res.shape == (1, 1, 32, 32)
-        gradcheck(conv_transpose2d, (x, weight, None, 1, 1), eps=1e-2, atol=1e-2)
+        gradcheck(
+            conv_transpose2d, (x, weight, None, 1, 1), eps=1e-2, atol=1e-2)
         gradgradcheck(
             conv_transpose2d, (x, weight, None, 1, 1), eps=1e-2, atol=1e-2)