message: Rename parameter of `generate`
  `resultSelectorOrObservable` -> `resultSelectorOrScheduler`
diff: @@ -336,7 +336,7 @@ export function generate<T, S>(options: GenerateOptions<T, S>): Observable<T>;
  export function generate<T, S>(initialStateOrOptions: S | GenerateOptions<T, S>,
  condition?: ConditionFunc<S>,
  iterate?: IterateFunc<S>,
  - resultSelectorOrObservable?: (ResultFunc<S, T>) | SchedulerLike,
  + resultSelectorOrScheduler?: (ResultFunc<S, T>) | SchedulerLike,
  scheduler?: SchedulerLike): Observable<T> {
  let resultSelector: ResultFunc<S, T>;
  @@ -349,13 +349,13 @@ export function generate<T, S>(initialStateOrOptions: S | GenerateOptions<T, S>,
  iterate = options.iterate;
  resultSelector = options.resultSelector || identity as ResultFunc<S, T>;
  scheduler = options.scheduler;
  - } else if (resultSelectorOrObservable === undefined || isScheduler(resultSelectorOrObservable)) {
  + } else if (resultSelectorOrScheduler === undefined || isScheduler(resultSelectorOrScheduler)) {
  initialState = initialStateOrOptions as S;
  resultSelector = identity as ResultFunc<S, T>;
  - scheduler = resultSelectorOrObservable as SchedulerLike;
  + scheduler = resultSelectorOrScheduler as SchedulerLike;
  } else {
  initialState = initialStateOrOptions as S;
  - resultSelector = resultSelectorOrObservable as ResultFunc<S, T>;
  + resultSelector = resultSelectorOrScheduler as ResultFunc<S, T>;
  }
  return new Observable<T>(subscriber => {
  