refactor(delayWhen): Clean up, add comments.
refactor(delayWhen): Clean up, add comments.

kwonoj/RxJS,ReactiveX/rxjs,benlesh/RxJS,martinsik/rxjs,benlesh/RxJS,kwonoj/RxJS,kwonoj/RxJS,ReactiveX/rxjs,benlesh/RxJS,kwonoj/RxJS,ReactiveX/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/RxJS,martinsik/rxjs,benlesh/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/rxjs,ReactiveX/rxjs