Fix typo in model docs.
Fix typo in model docs.
piosz/heapster,huangyuqi/heapster,liubog2008/heapster,whuwxl/heapster,saiwl/heapster,Stackdriver/heapster,bruceauyeung/heapster,whuwxl/heapster,AlmogBaku/heapster,aegixx/heapster,burmanm/heapster,huangyuqi/heapster,titilambert/heapster,mwringe/heapster,liubog2008/heapster,jackzampolin/heapster,bluebreezecf/heapster,andyxning/heapster,andyxning/heapster,Stackdriver/heapster,luxas/heapster,taimir/heapster,bluebreezecf/heapster,jackzampolin/heapster,krzyzacy/heapster,krzyzacy/heapster,adfin/statster,luxas/heapster,taimir/heapster,burmanm/heapster,AlmogBaku/heapster,saiwl/heapster,adfin/statster,mwringe/heapster,johanneswuerbach/heapster,titilambert/heapster,bruceauyeung/heapster,aegixx/heapster,piosz/heapster,johanneswuerbach/heapster