fix(docs): remove repetitive op3() in example (#5043)
fix(docs): remove repetitive op3() in example (#5043)


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