solr/solr-ref-guide/src/_templates/_footer.html.slim

#footer-text
  - if attr? :revnumber
    | #{attr 'version-label'} #{attr :revnumber}
  - if attr? 'last-update-label'
    br
    | #{attr 'last-update-label'} #{attr :docdatetime}
- unless (docinfo_content = (docinfo :footer)).empty?
  =docinfo_content