adding an example of how to override the exceptionHandler

src/ng/exceptionHandler.js

@@ -9,6 +9,20 @@
  * Any uncaught exception in angular expressions is delegated to this service.
  * The default implementation simply delegates to `$log.error` which logs it into
  * the browser console.
+ * 
+ * Example override:
+ * 
+ * <pre>
+ *   angular.module('exceptionOverride', []).factory('$exceptionHandler', function () {
+ *     return function (exception, cause) {
+ *       exception.message += ' (caused by "' + cause + '")';
+ *       throw exception;
+ *     };
+ *   });
+ * </pre>
+ * 
+ * This will make angular exceptions fail hard when they happen instead of just
+ * complaining to the console.
  *
  * In unit tests, if `angular-mocks.js` is loaded, this service is overridden by
  * {@link ngMock.$exceptionHandler mock $exceptionHandler} which aids in testing.