anchor.diff:                  #[code.sg-code tbody] elements; never directly inside #[code.sg-code table]
                 li.
                   always nest #[code.sg-code th] and #[code.sg-code td] elements directly inside #[code.sg-code tr] elements
  +              li: ins.
  +                only use #[code.sg-code th] elements when there is a single row and single column of headers
  +                (the single row must be in exactly one of the
  +                #[code.sg-code thead], #[code.sg-code tfoot], or #[code.sg-code tbody] elements)
  +              li: ins(datetime="2016-02-15 14:31").
  +                always provide the #[code.sg-code th[scope]] attribute
             li
               | When adding a link to one element, wrap the #[code.sg-code &lt;a&gt;] tag around
               |  the #[em outside] of the element to be linked.
               figure: pre.sg-code.sg-code-block.
                 &lt;a&gt;&lt;code&gt;this is correct&lt;/code&gt;&lt;/a&gt;
  -              &lt;code&gt;&lt;a&gt;this is incorrect&lt;/a&gt; unless there is more content not to be linked&lt;/code&gt;
  +              &lt;code&gt;&lt;a&gt;this is incorrect&lt;/a&gt;, unless there is more content not to be linked&lt;/code&gt;
                 &lt;a href="//MyCompany.com" itemprop="url"&gt;&lt;span itemprop="name"&gt;My Company&lt;/span&gt;&lt;/a&gt;
             li.
  -            Give every #[code.sg-code dfn] element a unique #[code.sg-code [id]], so that there is only
  -            one defining instance of a term per page. Furthermore, it can be used as
  -            a hyperlink anchor (#[i fragment identifier]).
  +            Use exactly one #[code.sg-code dfn] element per vocabulary term per page, and
  +            always provide the #[code.sg-code dfn[id]] attribute.
             li.
  -            Only use one #[code.sg-code abbr] element on a page to mark up a given abbreviation
  -            or acronym. Furthermore, give it a unique #[code.sg-code [id]].
  +            Use exactly one #[code.sg-code abbr] element per abbreviation/acronym per page, and
  +            always provide the #[code.sg-code abbr[id]] #[ins(datetime="2016-02-15 14:31") and #[code.sg-code abbr[title]]] attributes.
         section#optimization
           h2 Optimization
           ul
  
positive.code:               reference or inline, to import partials into a main stylesheet.
                These go after the filename comment block, because any code injected inline
                should be done so underneath.
            section#table-of-contents-1
              h4 Table of Contents
              p.
                There are two types of table-of-contents. The first type is used in the main stylesheet
  
negative.code:                     li: a(href="#direct-css-imports") Direct CSS Imports
                      li: a(href="#filename") Filename
                      li: a(href="#less-imports") Less Imports
                      li: a(href="#table-contents-1") Table of Contents
                      li: a(href="#section-and-subsection-headings") Section and Subsection Headings
                  //- li: a(href="#js-class-files") JS Class Files
        p.
  