[Docs] Improve rendering of ranking evaluation docs
[Docs] Improve rendering of ranking evaluation docs

nknize/elasticsearch,GlenRSmith/elasticsearch,kalimatas/elasticsearch,coding0011/elasticsearch,rajanm/elasticsearch,gfyoung/elasticsearch,nknize/elasticsearch,HonzaKral/elasticsearch,ThiagoGarciaAlves/elasticsearch,gfyoung/elasticsearch,ThiagoGarciaAlves/elasticsearch,qwerty4030/elasticsearch,GlenRSmith/elasticsearch,scorpionvicky/elasticsearch,HonzaKral/elasticsearch,s1monw/elasticsearch,scottsom/elasticsearch,nknize/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,s1monw/elasticsearch,scottsom/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,ThiagoGarciaAlves/elasticsearch,s1monw/elasticsearch,wangtuo/elasticsearch,s1monw/elasticsearch,qwerty4030/elasticsearch,gingerwizard/elasticsearch,gfyoung/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,GlenRSmith/elasticsearch,kalimatas/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,scottsom/elasticsearch,HonzaKral/elasticsearch,HonzaKral/elasticsearch,gfyoung/elasticsearch,rajanm/elasticsearch,GlenRSmith/elasticsearch,uschindler/elasticsearch,wangtuo/elasticsearch,robin13/elasticsearch,fred84/elasticsearch,robin13/elasticsearch,fred84/elasticsearch,rajanm/elasticsearch,s1monw/elasticsearch,rajanm/elasticsearch,wangtuo/elasticsearch,kalimatas/elasticsearch,nknize/elasticsearch,scorpionvicky/elasticsearch,uschindler/elasticsearch,coding0011/elasticsearch,robin13/elasticsearch,rajanm/elasticsearch,scorpionvicky/elasticsearch,rajanm/elasticsearch,qwerty4030/elasticsearch,uschindler/elasticsearch,gfyoung/elasticsearch,uschindler/elasticsearch,wangtuo/elasticsearch,scottsom/elasticsearch,gingerwizard/elasticsearch,coding0011/elasticsearch,coding0011/elasticsearch,fred84/elasticsearch,coding0011/elasticsearch,kalimatas/elasticsearch,fred84/elasticsearch,qwerty4030/elasticsearch,ThiagoGarciaAlves/elasticsearch,fred84/elasticsearch,kalimatas/elasticsearch,ThiagoGarciaAlves/elasticsearch,wangtuo/elasticsearch,scorpionvicky/elasticsearch,scottsom/elasticsearch,nknize/elasticsearch,qwerty4030/elasticsearch,ThiagoGarciaAlves/elasticsearch,uschindler/elasticsearch