!490 update unique with pad comment

Merge pull request !490 from wuxuejian/unique_with_pad_format

mindspore/ops/operations/array_ops.py

@@ -699,7 +699,7 @@ class UniqueWithPad(PrimitiveWithInfer):
         - idx (Tensor) - The index of each value of x in the unique output y, the shape and type same as x.
 
     Examples:
-        >>> x = Tensor(np.array([[1, 1, 5, 5, 4, 4, 3, 3, 2, 2,]), mindspore.int32)
+        >>> x = Tensor(np.array([1, 1, 5, 5, 4, 4, 3, 3, 2, 2,]), mindspore.int32)
         >>> pad_num = 8
         >>> out = P.UniqueWithPad()(x, pad_num)
         ([1, 5, 4, 3, 2, 8, 8, 8, 8, 8], [0, 0, 1, 1, 2, 2, 3, 3, 4, 4])