Fixed incorrect examples of ActiveRecord error message lookup in the …

…I18N guide [Thanks Alex Fortuna]

See http://www.ruby-forum.com/topic/179273

railties/guides/source/i18n.textile

@@ -705,20 +705,20 @@ end
 The key for the error message in this case is +:blank+. Active Record will lookup this key in the namespaces:
 
 <ruby>
-activerecord.errors.messages.models.[model_name].attributes.[attribute_name]
-activerecord.errors.messages.models.[model_name]
+activerecord.errors.models.[model_name].attributes.[attribute_name]
+activerecord.errors.models.[model_name]
 activerecord.errors.messages
 </ruby>
 
 Thus, in our example it will try the following keys in this order and return the first result:
 
 <ruby>
-activerecord.errors.messages.models.user.attributes.name.blank
-activerecord.errors.messages.models.user.blank
+activerecord.errors.models.user.attributes.name.blank
+activerecord.errors.models.user.blank
 activerecord.errors.messages.blank
 </ruby>
 
-When your models are additionally using inheritance then the messages are looked up for the inherited model class names are looked up.
+When your models are additionally using inheritance then the messages are looked up in the inheritance chain.
 
 For example, you might have an Admin model inheriting from User: