add :nodoc: to internal implementations [ci skip]

4 files changed, 4 insertions, 4 deletions

diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb
index f30d00b355..2242c59131 100644
--- a/activemodel/lib/active_model/attribute_methods.rb
+++ b/activemodel/lib/active_model/attribute_methods.rb
@@ -459,7 +459,7 @@ module ActiveModel
     end
 
     protected
-      def attribute_method?(attr_name)
+      def attribute_method?(attr_name) #:nodoc:
         respond_to_without_attributes?(:attributes) && attributes.include?(attr_name)
       end
 
diff --git a/activemodel/lib/active_model/callbacks.rb b/activemodel/lib/active_model/callbacks.rb
index b8ba1a0a52..80385c2614 100644
--- a/activemodel/lib/active_model/callbacks.rb
+++ b/activemodel/lib/active_model/callbacks.rb
@@ -46,7 +46,7 @@ module ActiveModel
   # Would only create the +after_create+ and +before_create+ callback methods in
   # your class.
   module Callbacks
-    def self.extended(base)
+    def self.extended(base) #:nodoc:
       base.class_eval do
         include ActiveSupport::Callbacks
       end
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 6307477145..567677bbb9 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -76,7 +76,7 @@ module ActiveModel
       @messages = {}
     end
 
-    def initialize_dup(other)
+    def initialize_dup(other) #:nodoc:
       @messages = other.messages.dup
       super
     end
diff --git a/activemodel/lib/active_model/model.rb b/activemodel/lib/active_model/model.rb
index 3af95b09b0..cb0a051ca5 100644
--- a/activemodel/lib/active_model/model.rb
+++ b/activemodel/lib/active_model/model.rb
@@ -54,7 +54,7 @@ module ActiveModel
   # For more detailed information on other functionalities available, please refer
   # to the specific modules included in <tt>ActiveModel::Model</tt> (see below).
   module Model
-    def self.included(base)
+    def self.included(base) #:nodoc:
       base.class_eval do
         extend  ActiveModel::Naming
         extend  ActiveModel::Translation