Add example of redirect_to that uses a named route. Closes #7149 [stevenbristol]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8316 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_controller/base.rb

@@ -1024,6 +1024,7 @@ def default_url_options(options) #:doc:
       #   redirect_to post
       #   redirect_to "http://www.rubyonrails.org"
       #   redirect_to "/images/screenshot.jpg"
+      #   redirect_to articles_url
       #   redirect_to :back
       #
       # The redirection happens as a "302 Moved" header unless otherwise specified.