Parser: Minor JSDoc corrections
Parser: Minor JSDoc corrections

mozilla/normandy,Osmose/normandy,mozilla/normandy,mozilla/normandy,TomFrost/Jexl,mozilla/normandy,TechnologyAdvice/Jexl,will-weiss/Jexl,Osmose/normandy,Osmose/normandy,Osmose/normandy,dotbr/Jexl