docs(windowToggle): fix example
MODIFY
src/internal/operators/windowToggle.ts
src/internal/operators/windowToggle.ts
@@ -27,14 +27,14 @@ import { OperatorFunction } from '../types';
* ## Example
* Every other second, emit the click events from the next 500ms
* ```javascript
- * import { fromEvent, interval } from 'rxjs';
+ * import { fromEvent, interval, EMPTY } from 'rxjs';
* import { windowToggle, mergeAll } from 'rxjs/operators';
*
* const clicks = fromEvent(document, 'click');
* const openings = interval(1000);
* const result = clicks.pipe(
- * windowToggle(openings, i => i % 2 ? interval(500) : empty()),
- * mergeAll(),
+ * windowToggle(openings, i => i % 2 ? interval(500) : EMPTY),
+ * mergeAll()
* );
* result.subscribe(x => console.log(x));
* ```

docs(windowToggle): fix example (#4549)