code cleanup: rubocop: fix Lint/IneffectiveAccessModifier in app/models/mailer.rb

git-svn-id: http://svn.redmine.org/redmine/trunk@18778 e93f8b46-1217-0410-a6f0-8f06a7374b81

.rubocop_todo.yml

@@ -393,7 +393,6 @@ Lint/IneffectiveAccessModifier:
     - 'app/models/attachment.rb'
     - 'app/models/issue.rb'
     - 'app/models/mail_handler.rb'
-    - 'app/models/mailer.rb'
     - 'app/models/user.rb'
 
 Lint/InterpolationCheck:

app/models/mailer.rb

@@ -742,7 +742,9 @@ class Mailer < ActionMailer::Base
     h.each { |k,v| headers["X-Redmine-#{k}"] = v.to_s }
   end
 
-  def self.token_for(object, user)
+  # Singleton class method is public
+  class << self
+    def token_for(object, user)
       timestamp = object.send(object.respond_to?(:created_on) ? :created_on : :updated_on)
       hash = [
         "redmine",
@@ -756,15 +758,16 @@ class Mailer < ActionMailer::Base
     end
 
     # Returns a Message-Id for the given object
-  def self.message_id_for(object, user)
+    def message_id_for(object, user)
       token_for(object, user)
     end
 
     # Returns a uniq token for a given object referenced by all notifications
     # related to this object
-  def self.references_for(object, user)
+    def references_for(object, user)
       token_for(object, user)
     end
+  end
 
   def message_id(object)
     @message_id_object = object