message: docs(timeInterval): fix broken link to timeInterval marble diagram
diff: @@ -17,7 +17,7 @@ import { map } from './map';
  * <span class="informal">Convert an Observable that emits items into one that
  * emits indications of the amount of time elapsed between those emissions.</span>
  *
  - * ![](timeinterval.png)
  + * ![](timeInterval.png)
  *
  * ## Examples
  * Emit interval between current value with the last value
  @@ -51,14 +51,16 @@ import { map } from './map';
  * value and interval.
  */
  export function timeInterval<T>(scheduler: SchedulerLike = async): OperatorFunction<T, TimeInterval<T>> {
  - return (source: Observable<T>) => defer(() => {
  + return (source: Observable<T>) =>
  + defer(() => {
  return source.pipe(
  // TODO(benlesh): correct these typings.
  - scan(
  - ({ current }, value) => ({ value, current: scheduler.now(), last: current }),
  - { current: scheduler.now(), value: undefined, last: undefined } as any
  - ) as OperatorFunction<T, any>,
  - map<any, TimeInterval<T>>(({ current, last, value }) => new TimeInterval(value, current - last)),
  + scan(({ current }, value) => ({ value, current: scheduler.now(), last: current }), {
  + current: scheduler.now(),
  + value: undefined,
  + last: undefined,
  + } as any) as OperatorFunction<T, any>,
  + map<any, TimeInterval<T>>(({ current, last, value }) => new TimeInterval(value, current - last))
  );
  });
  }
  