message: docs(bindCallback): fix broken example
  * Error: someFunction is not defined
  Error: someFunction is not defined
  * Remove superfluous parens.
diff: @@ -125,11 +125,11 @@ export function bindCallback(callbackFunc: Function, scheduler?: SchedulerLike):
  * ```javascript
  * import { bindCallback } from 'rxjs';
  *
  - * someFunction((a, b, c) => {
  + * const someFunction = (a, b, c) => {
  * console.log(a); // 5
  * console.log(b); // 'some string'
  * console.log(c); // {someProperty: 'someValue'}
  - * });
  + * };
  *
  * const boundSomeFunction = bindCallback(someFunction);
  * boundSomeFunction().subscribe(values => {
  