Rails 3.2.9 through 3.2.x use the same Rails::Rack::Logger#started_request_message
github.com/rails/rails/blob/v3.2.21/railties/lib/rails/rack/logger.rb#L37-L44
github.com/rails/rails/blob/v3.2.9/railties/lib/rails/rack/logger.rb#L37-L44