Fix grammar in docs
Fix grammar in docs


tristanfisher/flask,fkazimierczak/flask,pallets/flask,drewja/flask,auready/flask,pallets/flask,drewja/flask,fkazimierczak/flask,mitsuhiko/flask,dawran6/flask,drewja/flask,tristanfisher/flask,mitsuhiko/flask,pallets/flask,auready/flask,fkazimierczak/flask,dawran6/flask