message: docs(throwError): Fix markdown code examples
diff: @@ -22,7 +22,13 @@ import { Subscriber } from '../Subscriber';
  *
  * const result = concat(of(7), throwError(new Error('oops!')));
  * result.subscribe(x => console.log(x), e => console.error(e));
  - * ```javascript
  + *
  + * // Logs:
  + * // 7
  + * // Error: oops!
  + * ```
  + *
  + * ---
  *
  * ### Map and flatten numbers to the sequence 'a', 'b', 'c', but throw an error for 13
  * ```javascript
  @@ -30,12 +36,22 @@ import { Subscriber } from '../Subscriber';
  * import { mergeMap } from 'rxjs/operators';
  *
  * interval(1000).pipe(
  - * mergeMap(x => x === 13
  - * ? throwError('Thirteens are bad')
  + * mergeMap(x => x === 2
  + * ? throwError('Twos are bad')
  * : of('a', 'b', 'c')
  * ),
  * ).subscribe(x => console.log(x), e => console.error(e));
  + *
  + * // Logs:
  + * // a
  + * // b
  + * // c
  + * // a
  + * // b
  + * // c
  + * // Twos are bad
  * ```
  + *
  * @see {@link Observable}
  * @see {@link empty}
  * @see {@link never}
  