Fix grammatical error in whyJest[9].content (#1987)
Fix grammatical error in whyJest[9].content (#1987)


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