AngularJs provider is not defined when using yeoman template -

source: http://plnkr.co/edit/npytspwsy3rh0bzl9juq

the code example works on plnkr. when copy code new app created yeoman following error:

referenceerror: $hello not defined @ $get (http://localhost:9000/scripts/app.js:21:16) @ object.invoke (http://localhost:9000/components/angular/angular.js:2864:28) @ http://localhost:9000/components/angular/angular.js:2702:37 @ getservice (http://localhost:9000/components/angular/angular.js:2824:39) @ object.invoke (http://localhost:9000/components/angular/angular.js:2842:13) @ http://localhost:9000/components/angular/angular.js:2702:37 @ object.getservice [as get] (http://localhost:9000/components/angular/angular.js:2824:39) @ http://localhost:9000/components/angular/angular.js:9545:24 @ filter (http://localhost:9000/components/angular/angular.js:6107:14) @ _filterchain (http://localhost:9000/components/angular/angular.js:6098:41)  

i can't find out why works on plnkr doesn't work freshly created angular app.

the yeoman app looks this:

'use strict';  angular.module('asdfapp', ['myhello'])   .config(function ($routeprovider) {     $routeprovider       .when('/', {         templateurl: 'views/main.html',         controller: 'mainctrl'       })       .otherwise({         redirectto: '/'       });   });    var mymodule = angular.module('myhello', []);  mymodule.provider('$hello', function () {     this.$get = function () {         $hello = function (key) {             return 'hello ' + key;         };          return $hello;     } });  mymodule.filter('hello',function ($parse, $hello) {     return function (key) {         return $hello(key);     }; }); 

and works in yeoman scaffolded app when change code (return function in object):

var mymodule = angular.module('myhello', []);  mymodule.provider('$hello', function () {     this.$get = function () {         var = function (key) {             return 'hello ' + key;         };          return { : say};     } });  mymodule.filter('hello',function ($parse, $hello) {     return function (key) {         return $hello.say(key);     }; });