Fixing isPrime test case
Fixing isPrime test case

scurimich/js-assignments,PROteinBY/js-assignments,AlexSavchuk/rolling-scopes-js-assignments,rolling-scopes-school/js-assignments,aorgish/rolling-scopes-js-assignments,Arnold77777/js-assignments,FedorovD/js-assignments,urahara-dono/js-assignments,IgorOzimuk/js-assignments,andrei6184/js-assignments,mishka3097/js-assignments,Spoyke/rolling-scopes-js-assignments