docs(guide/Directives): let myTabs directive ctrl use inline array notation

modified `docsTabsExample` myTabs directive ctrl at
[Creating Directives that Communicate Example](https://docs.angularjs.org/guide/directive#creating-directives-that-communicate) so that it uses
[Inline Array Annotation](https://docs.angularjs.org/guide/di#inline-array-annotation)
and is compatible with
[Using Strict Dependency Injection](https://docs.angularjs.org/guide/di#using-strict-dependency-injection)

Closes angular#12767

Author: s-light

docs/content/guide/directive.ngdoc

@@ -902,7 +902,7 @@ to which tab is active.
           restrict: 'E',
           transclude: true,
           scope: {},
-          controller: function($scope) {
+          controller: ['$scope', function($scope) {
             var panes = $scope.panes = [];
 
             $scope.select = function(pane) {
@@ -918,7 +918,7 @@ to which tab is active.
               }
               panes.push(pane);
             };
-          },
+          }],
           templateUrl: 'my-tabs.html'
         };
       })