Fix grammer/typos.
Fix grammer/typos.

tcolgate/docs,ChaoticMind/docs,jmptrader/docs,bluecmd/prometheus-docs,chosenken/docs,jmptrader/docs,prometheus/docs,tcolgate/docs,ddfreyne/prometheus-docs,du2016/prometheus-docs,dln/docs,ChaoticMind/docs,bluecmd/prometheus-docs,prometheus/docs,chosenken/docs,vic3lord/docs,evanphx/docs,pdbogen/docs,Cepave/openfalcon.io,tcolgate/docs,ddfreyne/prometheus-docs,fabxc/docs,jimmidyson/docs,chosenken/docs,Cepave/openfalcon.io,fabxc/docs,evanphx/docs,prometheus/docs,ddfreyne/prometheus-docs,jmptrader/docs,du2016/prometheus-docs,open-falcon/open-falcon.github.io,dato/prometheus-docs,bluecmd/prometheus-docs,chosenken/docs,pdbogen/docs,open-falcon/open-falcon.github.io,dln/docs,fabxc/docs,evanphx/docs,pdbogen/docs,dato/prometheus-docs,open-falcon/open-falcon.github.io,ddfreyne/prometheus-docs,jimmidyson/docs,vic3lord/docs,dln/docs,vic3lord/docs,dato/prometheus-docs,ChaoticMind/docs,du2016/prometheus-docs,jimmidyson/docs,Cepave/openfalcon.io