The wrong comment in ndarray_bakcend_cuda.cu

[lzymmm123]

In src/ ndarray_bakcend_cuda.cu file, The comment of the parameter 'strides' and 'offset' with the function CompactKernel and Compact is not consistency.

CompactKernel:

*   strides: vector of strides of out array
*   offset: offset of out array

Compact:

* strides: strides of the *a* array (not out, which has compact strides)
*  offset: offset of the *a* array (not out, which has zero offset, being compact)

I think the parameters strides and offsets all belong to the input array "a".