add :nodoc: to AV StylesheetIncludeTag, JavascriptIncludeTag and AssetIncludeTag

actionpack/lib/action_view/helpers/asset_tag_helpers/asset_include_tag.rb

@@ -7,7 +7,7 @@ module ActionView
   module Helpers
     module AssetTagHelper
 
-      class AssetIncludeTag
+      class AssetIncludeTag #:nodoc:
         include TagHelper
 
         attr_reader :config, :asset_paths

actionpack/lib/action_view/helpers/asset_tag_helpers/javascript_tag_helpers.rb

@@ -6,7 +6,7 @@ module ActionView
   module Helpers
     module AssetTagHelper
 
-      class JavascriptIncludeTag < AssetIncludeTag
+      class JavascriptIncludeTag < AssetIncludeTag #:nodoc:
         def asset_name
           'javascript'
         end

actionpack/lib/action_view/helpers/asset_tag_helpers/stylesheet_tag_helpers.rb

@@ -6,7 +6,7 @@ module ActionView
   module Helpers
     module AssetTagHelper
 
-      class StylesheetIncludeTag < AssetIncludeTag
+      class StylesheetIncludeTag < AssetIncludeTag #:nodoc:
         def asset_name
           'stylesheet'
         end
@@ -53,7 +53,7 @@ def register_stylesheet_expansion(expansions)
         # If the +source+ filename has no extension, <tt>.css</tt> will be appended (except for explicit URIs).
         # Full paths from the document root will be passed through.
         # Used internally by +stylesheet_link_tag+ to build the stylesheet path.
-        # 
+        #
         #   stylesheet_path "style"                                  # => /stylesheets/style.css
         #   stylesheet_path "dir/style.css"                          # => /stylesheets/dir/style.css
         #   stylesheet_path "/dir/style.css"                         # => /dir/style.css