Merge pull request #38912 from kamipo/nodoc_association_relation

Do not expose association relation in the API doc [ci skip]

activerecord/lib/active_record/association_relation.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module ActiveRecord
-  class AssociationRelation < Relation
+  class AssociationRelation < Relation # :nodoc:
     def initialize(klass, association, **)
       super(klass)
       @association = association

activerecord/lib/active_record/associations/collection_proxy.rb

@@ -920,7 +920,7 @@ module ActiveRecord
         !!@association.include?(record)
       end
 
-      def proxy_association
+      def proxy_association # :nodoc:
         @association
       end