doc: sack: len(sack) -> method __len__
doc: sack: len(sack) -> method __len__

mizdebsk/hawkey,megaumi/hawkey,rpm-software-management/hawkey,ignatenkobrain/hawkey,rpm-software-management/hawkey,Conan-Kudo/hawkey,megaumi/hawkey,mizdebsk/hawkey,mluscon/hawkey,ignatenkobrain/hawkey,Conan-Kudo/hawkey,megaumi/hawkey,Conan-Kudo/hawkey,mluscon/hawkey,rholy/hawkey,Conan-Kudo/hawkey,ignatenkobrain/hawkey,rholy/hawkey,mluscon/hawkey,rpm-software-management/hawkey,rpm-software-management/hawkey,mizdebsk/hawkey,ignatenkobrain/hawkey,megaumi/hawkey,rholy/hawkey,rholy/hawkey,mizdebsk/hawkey,mluscon/hawkey