avoid empty api pages

actionpack/lib/abstract_controller/asset_paths.rb

@@ -1,5 +1,5 @@
 module AbstractController
-  module AssetPaths
+  module AssetPaths #:nodoc:
     extend ActiveSupport::Concern
 
     included do

actionpack/lib/abstract_controller/base.rb

@@ -5,8 +5,11 @@ require 'active_support/descendants_tracker'
 require 'active_support/core_ext/module/anonymous'
 
 module AbstractController
-  class Error < StandardError; end
-  class ActionNotFound < StandardError; end
+  class Error < StandardError #:nodoc:
+  end
+
+  class ActionNotFound < StandardError #:nodoc:
+  end
 
   # <tt>AbstractController::Base</tt> is a low-level API. Nobody should be
   # using it directly, and subclasses (like ActionController::Base) are

actionpack/lib/abstract_controller/logger.rb

@@ -1,7 +1,7 @@
 require "active_support/benchmarkable"
 
 module AbstractController
-  module Logger
+  module Logger #:nodoc:
     extend ActiveSupport::Concern
 
     included do