anchor.diff:                +footnote('address')
                 +footnote('dt')
                 +footnote('th')
  -            | The #[code address], #[code dt], and #[code th] elements may contain flow content except
  -            |  sectioning content, heading content, headers, and footers.
  +            | 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")
  
positive.code:               +footnote('wbr-nothing-content-model')
                +footnote('img-nothing-content-model')
                +footnote('input-nothing-content-model')
              | An element with an #[dfn Nothing Content Model] may contain no children. 
              small.
                Most elements with a Nothing Content Model are also #[dfn void elements], which
                have a start tag but no end tag.
            li
              sup
                +footnote('section-sectioning-content')
                +footnote('article-sectioning-content')
                +footnote('aside-sectioning-content')
                +footnote('nav-sectioning-content')
              | #[dfn Sectioning Content] adds to the Document Outline (#[abbr.c-Acro(title="document outline") DO]).
            li
              sup
                +footnote('body-sectioning-root')
                +footnote('figure-sectioning-root')
                +footnote('blockquote-sectioning-root')
                +footnote('td-sectioning-root')
              | #[dfn Sectioning Roots] have outlines, but they are encapsulated,
              |  hidden from the #[abbr.c-Acro(title="document outline") DO].
            li
              sup
                +footnote('li')
  
negative.code:         ul.c-ListFootnotes
            li
              sup
                +footnote('body-sectioning-root')
                +footnote('figure-sectioning-root')
                +footnote('blockquote-sectioning-root')
                +footnote('td-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
              sup
                +footnote('section-sectioning-content')
                +footnote('article-sectioning-content')
                +footnote('aside-sectioning-content')
                +footnote('nav-sectioning-content')
              | Each #[dfn#sectioning-content Sectioning Content] adds a section to the #[span.c-Acro DO].
            li
              sup
                +footnote('hr-nothing-content-model')
  