docs(*): fix various outdated docs and examples

Closes angular#1030

Author: IgorMinar

docs/content/cookbook/buzz.ngdoc

@@ -12,10 +12,10 @@ to retrieve Buzz activity and comments.
 <doc:example>
  <doc:source>
     <script>
-    BuzzController.$inject = ['$resource'];
-    function BuzzController($resource) {
-     this.userId = 'googlebuzz';
-     this.Activity = $resource(
+    BuzzController.$inject = ['$scope', '$resource'];
+    function BuzzController($scope, $resource) {
+     $scope.userId = 'googlebuzz';
+     $scope.Activity = $resource(
       'https://www.googleapis.com/buzz/v1/activities/:userId/:visibility/:activityId/:comments',
       {alt: 'json', callback: 'JSON_CALLBACK'},
       { get:     {method: 'JSONP', params: {visibility: '@self'}},
@@ -24,10 +24,10 @@ to retrieve Buzz activity and comments.
     }
     BuzzController.prototype = {
      fetch: function() {
-      this.activities = this.Activity.get({userId:this.userId});
+      $scope.activities = $scope.Activity.get({userId:this.userId});
      },
      expandReplies: function(activity) {
-      activity.replies = this.Activity.replies({userId: this.userId, activityId: activity.id});
+      activity.replies = $scope.Activity.replies({userId: this.userId, activityId: activity.id});
      }
     };
     </script>

docs/content/cookbook/form.ngdoc

@@ -11,7 +11,7 @@ allow a user to enter data.
  <doc:source>
   <script>
     function FormController($scope) {
-      $scope.user = {
+      var user = $scope.user = {
         name: 'John Smith',
         address:{line1: '123 Main St.', city:'Anytown', state:'AA', zip:'12345'},
         contacts:[{type:'phone', value:'1(234) 555-1212'}]
@@ -20,12 +20,12 @@ allow a user to enter data.
       $scope.zip = /^\d\d\d\d\d$/;
 
       $scope.addContact = function() {
-         $scope.user.contacts.push({type:'email', value:''});
+         user.contacts.push({type:'email', value:''});
       };
 
       $scope.removeContact = function(contact) {
-        for (var i = 0, ii = this.user.contacts.length; i < ii; i++) {
-          if (contact === this.user.contacts[i]) {
+        for (var i = 0, ii = user.contacts.length; i < ii; i++) {
+          if (contact === user.contacts[i]) {
             $scope.user.contacts.splice(i, 1);
           }
         }

docs/content/cookbook/mvc.ngdoc

@@ -6,9 +6,10 @@ MVC allows for a clean an testable separation between the behavior (controller)
 (HTML template). A Controller is just a JavaScript class which is grafted onto the scope of the
 view. This makes it very easy for the controller and the view to share the model.
 
-The model is simply the controller's this. This makes it very easy to test the controller in
-isolation since one can simply instantiate the controller and test without a view, because there is
-no connection between the controller and the view.
+The model is a set of objects and primitives that are referenced from the Scope ($scope) object.
+This makes it very easy to test the controller in isolation since one can simply instantiate the
+controller and test without a view, because there is no connection between the controller and the
+view.
 
 
 <doc:example>

docs/content/guide/dev_guide.services.$location.ngdoc

@@ -622,11 +622,11 @@ example:
 </pre>
 <pre>
 // js - controller
-this.$watch('locationPath', function(path) {
+$scope.$watch('locationPath', function(path) {
   $location.path(path);
 });
 
-this.$watch('$location.path()', function(path) {
+$scope.$watch('$location.path()', function(path) {
   scope.locationPath = path;
 });
 </pre>

docs/content/guide/dev_guide.templates.filters.creating_filters.ngdoc

@@ -2,16 +2,10 @@
 @name Developer Guide: Templates: Filters: Creating Angular Filters
 @description
 
-Writing your own filter is very easy: just define a JavaScript function on the `angular.module.ng.$filter`
-object.
-The framework passes in the input value as the first argument to your function. Any filter
-arguments are passed in as additional function arguments.
-
-You can use these variables in the function:
-
-* `this` — The current scope.
-* `this.$element` — The DOM element containing the binding. The `$element` variable allows the
-filter to manipulate the DOM.
+Writing your own filter is very easy: just register a new filter (injectable) factory function with
+your module. This factory function should return a new filter function which takes the input value
+as the first argument. Any filter arguments are passed in as additional arguments to the filter
+function.
 
 The following sample filter reverses a text string. In addition, it conditionally makes the
 text upper-case and assigns color.

docs/content/guide/dev_guide.unit-testing.ngdoc

@@ -218,16 +218,16 @@ In angular the controllers are strictly separated from the DOM manipulation logi
 a much easier testability story as can be seen in this example:
 
 <pre>
-function PasswordCntrl() {
-  this.password = '';
-  this.grade = function() {
-    var size = this.password.length;
+function PasswordCntrl($scope) {
+  $scope.password = '';
+  $scope.grade = function() {
+    var size = $scope.password.length;
     if (size > 8) {
-      this.strength = 'strong';
+      $scope.strength = 'strong';
     } else if (size > 3) {
-      this.strength = 'medium';
+      $scope.strength = 'medium';
     } else {
-      this.strength = 'weak';
+      $scope.strength = 'weak';
     }
   };
 }

docs/content/guide/expression.ngdoc

@@ -55,14 +55,14 @@ You can try evaluating different expressions here:
 <doc:source>
  <script>
    function Cntl2($scope) {
-     $scope.exprs = [];
+     var exprs = $scope.exprs = [];
      $scope.expr = '3*10|currency';
      $scope.addExp = function(expr) {
-        this.exprs.push(expr);
+        exprs.push(expr);
      };
 
      $scope.removeExp = function(index) {
-       this.exprs.splice(index, 1);
+       exprs.splice(index, 1);
      };
    }
  </script>
@@ -104,7 +104,7 @@ prevent accidental access to the global state (a common source of subtle bugs).
      $scope.name = 'World';
 
      $scope.greet = function() {
-       ($window.mockWindow || $window).alert('Hello ' + this.name);
+       ($window.mockWindow || $window).alert('Hello ' + $scope.name);
      }
    }
  </script>