Underscore in _attr_readonly method name is back (Upgrading RoR guide…

…) [ci skip]

guides/source/upgrading_ruby_on_rails.textile

@@ -44,7 +44,7 @@ The <tt>delete</tt> method in collection associations can now receive <tt>Fixnum
 
 Rails 4.0 has changed how orders get stacked in +ActiveRecord::Relation+. In previous versions of rails new order was applied after previous defined order. But this is no long true. Check "ActiveRecord Query guide":active_record_querying.html#ordering for more information.
 
-Rails 4.0 has changed <tt>serialized_attributes</tt> and <tt>attr_readonly</tt> to class methods only. Now you shouldn't use instance methods, it's deprecated. You must change them, e.g. <tt>self.serialized_attributes</tt> to <tt>self.class.serialized_attributes</tt>.
+Rails 4.0 has changed <tt>serialized_attributes</tt> and <tt>&#95;attr_readonly</tt> to class methods only. Now you shouldn't use instance methods, it's deprecated. You must change them, e.g. <tt>self.serialized_attributes</tt> to <tt>self.class.serialized_attributes</tt>.
 
 h4(#active_model4_0). Active Model