docs(minerr/unpr): provide more info on $scope injection errors

ahmedalejo · pkozlowski-opensource · commit a9e02de5e28c · 2015-02-21T12:55:12.000+01:00
Closes angular#11030
diff --git a/docs/content/error/$injector/unpr.ngdoc b/docs/content/error/$injector/unpr.ngdoc
@@ -69,3 +69,15 @@ angular.module('myModule', [])
 ```
 
 Use the `$controller` service if you want to instantiate controllers yourself.
+
+Attempting to inject a scope object into anything that's not a controller or a directive,
+for example a service, will also throw an `Unknown provider: $scopeProvider <- $scope` error.
+This might happen if one mistakenly registers a controller as a service, ex.:
+
+```
+angular.module('myModule', [])
+  .service('MyController', ['$scope', function($scope) {
+    // This controller throws an unknown provider error because
+    // a scope object cannot be injected into a service.
+  }]);
+```
