docs(concat): tidy example
MODIFY
src/internal/observable/concat.ts
src/internal/observable/concat.ts
@@ -91,7 +91,7 @@ export function concat<R>(...observables: (ObservableInput<any> | SchedulerLike)
* import { take } from 'rxjs/operators';
*
* const timer = interval(1000).pipe(take(2));
- * *
+ *
* concat(timer, timer) // concatenating the same Observable!
* .subscribe(
* value => console.log(value),

docs(concat): tidy example (#4620)