Add back page:before and page as non-deprecated
Add back page:before and page as non-deprecated

nycitt/gitbook,qingying5810/gitbook,thelastmile/gitbook,minghe/gitbook,iflyup/gitbook,sudobashme/gitbook,webwlsong/gitbook,grokcoder/gitbook,GitbookIO/gitbook,npracht/documentation,guiquanz/gitbook,megumiteam/documentation,wewelove/gitbook,ryanswanson/gitbook,haamop/documentation,athiruban/gitbook,tshoper/gitbook,haamop/documentation,youprofit/gitbook,rohan07/gitbook,rohan07/gitbook,escopecz/documentation,boyXiong/gitbook,gaearon/gitbook,minghe/gitbook,mautic/documentation,wewelove/gitbook,mautic/documentation,iflyup/gitbook,tzq668766/gitbook,CN-Sean/gitbook,boyXiong/gitbook,gencer/gitbook,sudobashme/gitbook,grokcoder/gitbook,tzq668766/gitbook,iamchenxin/gitbook,qingying5810/gitbook,nycitt/gitbook,gaearon/gitbook,gdbooks/gitbook,webwlsong/gitbook,gdbooks/gitbook,shibe97/gitbook,thelastmile/gitbook,gencer/gitbook,iamchenxin/gitbook,sunlianghua/gitbook,youprofit/gitbook,FKV587/gitbook,athiruban/gitbook,tshoper/gitbook,strawluffy/gitbook,escopecz/documentation,alex-dixon/gitbook,shibe97/gitbook,guiquanz/gitbook,npracht/documentation,FKV587/gitbook,megumiteam/documentation,CN-Sean/gitbook,alex-dixon/gitbook,sunlianghua/gitbook