Fix Rubocop violations and fix documentation visibility

Some methods were added to public API in
5b14129d8d4ad302b4e11df6bd5c7891b75f393c and they should be not part of
the public API.

3 files changed, 3 insertions, 3 deletions

diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb
index ffb83a972c..8fcac82a0d 100644
--- a/activerecord/lib/active_record/attribute_methods/primary_key.rb
+++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb
@@ -52,7 +52,7 @@ module ActiveRecord
 
       private
 
-        def attribute_method?(attr_name) # :doc:
+        def attribute_method?(attr_name)
           attr_name == "id" || super
         end
 
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb
index 727b4288e9..369a6e35aa 100644
--- a/activerecord/lib/active_record/attribute_methods/read.rb
+++ b/activerecord/lib/active_record/attribute_methods/read.rb
@@ -24,7 +24,7 @@ module ActiveRecord
           # to allocate an object on each call to the attribute method.
           # Making it frozen means that it doesn't get duped when used to
           # key the @attributes in read_attribute.
-          def define_method_attribute(name) # :doc:
+          def define_method_attribute(name)
             safe_name = name.unpack("h*".freeze).first
             temp_method = "__temp__#{safe_name}"
 
diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb
index a80ee74f47..fe0e01db28 100644
--- a/activerecord/lib/active_record/attribute_methods/write.rb
+++ b/activerecord/lib/active_record/attribute_methods/write.rb
@@ -10,7 +10,7 @@ module ActiveRecord
       module ClassMethods
         private
 
-          def define_method_attribute=(name) # :doc:
+          def define_method_attribute=(name)
             safe_name = name.unpack("h*".freeze).first
             ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name