Update mockReturnValue documentation (#3993)
Update mockReturnValue documentation (#3993)


cpojer/jest,ide/jest,cpojer/jest,cpojer/jest,skovhus/jest,facebook/jest,skovhus/jest,facebook/jest,ide/jest,bookman25/jest,bookman25/jest,bookman25/jest,ide/jest,facebook/jest,skovhus/jest