README.md in consul-0.7.0 vs README.md in consul-0.8.0

@@ -147,10 +147,32 @@
       end
 
     end
 
 
+Powers that require context (arguments)
+---------------------------------------
+
+Sometimes it can be useful to define powers that require context. To do so, just take an argument in your `power` block:
+
+    class Power
+      ...
+
+      power :assignable_story_states do |story|
+        if story.finished?
+          %w[delivered archived]
+        else
+          %w[committed started finished]
+        end
+      end
+
+When querying such a power, you always need to provide the context, e.g.:
+
+    story = ...
+    Power.current_assignable_story_state?(story, 'finished')
+
+
 Role-based permissions
 ----------------------
 
 Consul has no built-in support for role-based permissions, but you can easily implement it yourself. Let's say your `User` model has a string column `role` which can be `"author"` or `"admin"`:
 
@@ -414,10 +436,10 @@
 `Power.current` or, if it is not set, just assume that everything is accessible:
 
     class UserReport
 
       def data
-        Power.for_model(user).collect do |user|
+        Power.for_model(User).collect do |user|
           [user.name, user.email, user.income]
         end
       end
 
     end