Not shure if this is the correct place to make a contribution to the documentation or not. I could not find the source files on github so I will just post my remark here
The documentation of the pagination class is wrong concerning the "rel" attribute. The documentation states that there are being used by default and you can turn them off by setting $config['attributes']['rel'] to false. But in fact it's the other way around, rel attributes are disabled by default and could be enabled by setting the config variable.
