anchor.diff:              sup
                 +footnote('summary')
               | The #[code summary] element may contain either Phrasing Content, or exactly 1 Heading Element (#[code h1]&ndash;#[code h6])
  +          li
  +            sup
  +              +footnote('main-caveat')
  +            | There is one exception: the #[code main] element may be a descendant of #[code section],
  +            |  however I prefer to restrict this use anyway. In fact, I adhere to the belief that
  +            |  there should be exactly 1 #[code main] element per document, and that it should be
  +            |  a direct child of #[code body].
       script(src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous")
       script(src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML,https://chharvey.github.io/chhlib/mathjax-localconfig.js")
  
positive.code:           dd.update: time(datetime="2015-03-08 14:57") Mar 8, 2015 #[span.tod  2:57 PM]
            dd.update: time(datetime="2016-02-14 01:15") Feb 14, 2016 #[span.tod  1:15 AM]
            dd.update: time(datetime="2016-03-06 15:41") Mar  6, 2016 #[span.tod  3:42 PM]
            dd.update
              time(datetime="2016-03-24 13:38" itemprop="dateModified") Mar 24, 2016 #[span.tod  1:38 PM]
              span.o-Textbox.c-Label.c-Label--dang.-ml-1 Latest
          nav#table-contents
            h2 Table of Contents
  
negative.code:             | Each #[dfn#sectioning-content Sectioning Content] adds a section to the #[span.c-Acro DO].
            li
              sup
                +footnote('hn-heading-content')
              | #[dfn#heading-content Heading Content] provides a title for a #[b Sectioning Content] in the #[span.c-Acro DO].
            li
              sup
                +footnote('hr-nothing-content-model')
                +footnote('col-nothing-content-model')
                +footnote('br-nothing-content-model')
  