docs(filters): update examples to use modules

src/ng/filter/filters.js

@@ -15,14 +15,15 @@
  *
  *
  * @example
-   <example>
+   <example module="currencyExample">
      <file name="index.html">
        <script>
-         function Ctrl($scope) {
-           $scope.amount = 1234.56;
-         }
+         angular.module('currencyExample', [])
+           .controller('ExampleController', ['$scope', function($scope) {
+             $scope.amount = 1234.56;
+           }]);
        </script>
-       <div ng-controller="Ctrl">
+       <div ng-controller="ExampleController">
          <input type="number" ng-model="amount"> <br>
          default currency symbol ($): <span id="currency-default">{{amount | currency}}</span><br>
          custom currency identifier (USD$): <span>{{amount | currency:"USD$"}}</span>
@@ -74,14 +75,15 @@ function currencyFilter($locale) {
  * @returns {string} Number rounded to decimalPlaces and places a “,” after each third digit.
  *
  * @example
-   <example>
+   <example module="numberFilterExample">
      <file name="index.html">
        <script>
-         function Ctrl($scope) {
-           $scope.val = 1234.56789;
-         }
+         angular.module('numberFilterExample', [])
+           .controller('ExampleController', ['$scope', function($scope) {
+             $scope.val = 1234.56789;
+           }]);
        </script>
-       <div ng-controller="Ctrl">
+       <div ng-controller="ExampleController">
          Enter number: <input ng-model='val'><br>
          Default formatting: <span id='number-default'>{{val | number}}</span><br>
          No fractions: <span>{{val | number:0}}</span><br>