Fixing to break on first error
Fixing to break on first error

lolptdr/RxJSKoans-withanswers,pajaco/RxJSKoans,tb/RxJSKoans,brettshollenberger/rxjs_koans,tyrchen/RxJSKoans,Reactive-Extensions/RxJSKoans,ecasilla/RXJSKoans,JHKennedy4/RxJSKoans