Update preferences related documentation

Ok, then. I thought it must be for real, not just a template because, for
example, if you want to retreive a desk for a  given user the url is
similar and you don't get an error code.

On Fri, Sep 19, 2014 at 4:12 PM, Petr Jašek <notifications@github.com>
wrote:

> In apiary.apib:
>
> > @@ -107,7 +107,11 @@ List available resources.
> >                      },
> >                      {
> >                          "title": "preferences",
> > -                        "href": "/users/<regex():user_id>/preferences"
> > +                        "href": "/preferences"
>
> but it's a template - so url should be eg /users/5ebad123/preferences
>
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