anchor.diff:                +footnote('figure-sectioning-root')
                 +footnote('blockquote-sectioning-root')
                 +footnote('td-sectioning-root')
  +              +footnote('fieldset-sectioning-root')
  +              +footnote('details-sectioning-root')
  +              +footnote('dialog-sectioning-root')
               | #[dfn Sectioning Roots] have their own outlines, but they are encapsulated,
               |  hidden from the Document Outline (#[abbr.c-Acro#document-outline(title="document outline") DO]).
             li
  
positive.code:               +footnote('address')
                +footnote('dt')
                +footnote('th')
              | The #[code address], #[code dt], and #[code th] elements may contain Flow Content except
              |  Sectioning Content, Heading Content, #[code header]s, and #[code footer]s.
      script(src="../bower_components/jquery/dist/jquery.js")
      script(src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML,https://chharvey.github.io/chhlib/mathjax-localconfig.js")
      script(src="../core/scripts/global.js")
  
negative.code:         ul
            li #[code img] #[+tag('Nothing Content Model','img-nothing-content-model')]
        section
          h2 Form Content
          ul
            li #[code fieldset] #[+tag('Sectioning Root','fieldset-sectioning-root')]
            li #[code legend] #[+tag('Phrasing Content Model','legend-phrasing-content-model')]
            li #[code input] #[+tag('Nothing Content Model','input-nothing-content-model')]
            li #[code label] #[+tag('Phrasing Content Model','label-phrasing-content-model')] #[sup: +reference('label')]
        section
          h2 Interactive Content
          ul
            li #[code details] #[+tag('Sectioning Root','details-sectioning-root')]
            li #[code summary] #[+tag('Phrasing Content Model','summary-phrasing-content-model')] #[sup: +reference('summary')]
            li #[code dialog] #[+tag('Sectioning Root','dialog-sectioning-root')]
        footer
          ul.c-ListFootnotes
            li
  