As status code 418 => "I'm A Teapot" was removed from Rack at https://github.com/rack/rack/blob/master/lib/rack/utils.rb#L552, the Rails status symbol :i'm_ateapot does not exist anymore. The new status to symbol code `message.downcase.gsub(/\s|-|'/, '').to_sym` would have made it :i_m_a_teapot, by the way.
As status code 418 => "I'm A Teapot" was removed from Rack at https://github.com/rack/rack/blob/master/lib/rack/utils.rb#L552, the Rails status symbol :i'm_ateapot does not exist anymore. The new status to symbol code `message.downcase.gsub(/\s|-|'/, '').to_sym` would have made it :i_m_a_teapot, by the way.