mastodon/app/views/layouts/public.html.haml

- content_for :content do
  .container= yield
  .footer
    - if !user_signed_in? && single_user_mode?
      %span.single-user-login
        = link_to t('auth.login'), new_user_session_path
        —
      %span.domain= link_to site_hostname, about_path
    - else
      %span.domain= link_to site_hostname, root_path
    %span.powered-by
      != t('generic.powered_by', link: link_to('Mastodon', 'https://joinmastodon.org'))

= render template: 'layouts/application'