test(ngList): add protractor test to example

Author: petebacondarwin

src/ng/directive/input.js

@@ -2413,6 +2413,14 @@ var minlengthDirective = function() {
  *    <textarea ng-model="list" ng-list="&#10;" ng-trim="false"></textarea>
  *    <pre>{{ list | json }}</pre>
  *   </file>
+ *   <file name="protractor.js" type="protractor">
+ *     it("should split the text by newlines", function() {
+ *       var listInput = element(by.model('list'));
+ *       var output = element(by.binding('{{ list | json }}'));
+ *       listInput.sendKeys('abc\ndef\nghi');
+ *       expect(output.getText()).toContain('[\n  "abc",\n  "def",\n  "ghi"\n]');
+ *     });
+ *   </file>
  * </example>
  *
  * @element input