Devise::Mailer#scope_name and Devise::Mailer#resource shouldn't be public.

CHANGELOG.md

@@ -1,5 +1,9 @@
 ### Unreleased
 
+* removals
+  * `Devise::Mailer#scope_name` and `Devise::Mailer#resource` are now protected
+    methods instead of public.
+
 ### 4.2.0 - 2016-07-01
 
 * removals

lib/devise/mailers/helpers.rb

@@ -5,11 +5,12 @@ module Devise
 
       included do
         include Devise::Controllers::ScopedViews
-        attr_reader :scope_name, :resource
       end
 
       protected
 
+      attr_reader :scope_name, :resource
+
       # Configure default email options
       def devise_mail(record, action, opts={})
         initialize_from_record(record)