[Cython] bug in doc Tutorials/Working with NumPy

[Stepan Kasal]

Hello,

On Mon, Nov 09, 2015 at 09:44:15PM -0800, Robert Bradshaw wrote:
> I heartily agree that using unsigned types is the source of much
> surprising pain, we shouldn't be recommending it:

great, thanks a lot for updating the dev doc instantly.

> There's two directives: wraparound and boundscheck. The wraparound
> directive can be used to disable the check for negative values.

And thanks for catching this; I misunderstood this.

Stepan