TensorDot docString fix

mindspore/ops/composite/math_ops.py

@@ -185,6 +185,10 @@ def TensorDot(x1, x2, axes):
         >>> input_x1 = Tensor(np.ones(shape=[1, 2, 3]), mindspore.float32)
         >>> input_x2 = Tensor(np.ones(shape=[3, 1, 2]), mindspore.float32)
         >>> output = C.TensorDot(input_x1, input_x2, ((0,1),(1,2)))
+        >>> print(output)
+        [[2,2,2],
+         [2,2,2],
+         [2,2,2]]
     """
     shape_op = P.Shape()
     reshape_op = P.Reshape()