Documentation about Model.parent seems wrong

[xiaohanzhang]

In documentation about parent:

var Admin = User.extend({
  parent: User
});

This seems not right. Should it change to:

var Admin = User.extend({}, {
  parent: User
});

Thanks for all the work you have done.

[braddunbar]

Right you are! Updated in master and cherry-picked to gh-pages. Thanks much!