Added lib/ to the directories that will get application docs generated [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4373 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/CHANGELOG

 *SVN*
 
+* Added lib/ to the directories that will get application docs generated [DHH]
+
 * Add observer generator. Closes #5167. [francois.beausoleil@gmail.com]
 
 * Session migration generator obeys pluralize_table_names. #5145 [james.adam@gmail.com]

railties/lib/tasks/documentation.rake

@@ -6,6 +6,7 @@ namespace :doc do
     rdoc.options << '--line-numbers' << '--inline-source'
     rdoc.rdoc_files.include('doc/README_FOR_APP')
     rdoc.rdoc_files.include('app/**/*.rb')
+    rdoc.rdoc_files.include('lib/**/*.rb')
   }
 
   desc "Generate documentation for the Rails framework"