docs(ngList): fix example and add e2e test

Author: IgorMinar

src/ng/directive/input.js

@@ -1227,8 +1227,9 @@ var requiredDirective = function() {
        </script>
        <form name="myForm" ng-controller="Ctrl">
          List: <input name="namesInput" ng-model="names" ng-list required>
-         <span class="error" ng-show="myForm.list.$error.required">
+         <span class="error" ng-show="myForm.namesInput.$error.required">
            Required!</span>
+         <br>
          <tt>names = {{names}}</tt><br/>
          <tt>myForm.namesInput.$valid = {{myForm.namesInput.$valid}}</tt><br/>
          <tt>myForm.namesInput.$error = {{myForm.namesInput.$error}}</tt><br/>
@@ -1240,12 +1241,14 @@ var requiredDirective = function() {
         it('should initialize to model', function() {
           expect(binding('names')).toEqual('["igor","misko","vojta"]');
           expect(binding('myForm.namesInput.$valid')).toEqual('true');
+          expect(element('span.error').css('display')).toBe('none');
         });
 
         it('should be invalid if empty', function() {
           input('names').enter('');
           expect(binding('names')).toEqual('[]');
           expect(binding('myForm.namesInput.$valid')).toEqual('false');
+          expect(element('span.error').css('display')).not().toBe('none');
         });
       </doc:scenario>
     </doc:example>