anchor.diff:  |code:
     linenum-font-color: #ccc
   |===
  +
   . The line-gap property is used to tune the height of the background color applied to a span of block text highlighted using Rouge.
   . The code-linenum category only applies when using Pygments as the source highlighter.
   Otherwise, the style is controlled by the source highlighter theme.
  
positive.code:   header-cell:
      text-transform: uppercase
  |===
  . This key only controls the color that is used for stripes.
  The appearance of stripes is controlled using the `stripes` table attribute, the `table-stripes` document attribute (since Asciidoctor 2), or the `stripes` document attribute (prior to Asciidoctor 2).
  Permitted attribute values are even, odd, all, and none.
  
negative.code: |key:
    font-style: normal
  |===
  
  . The border is only used if a border color is specified and the border width is not explicitly set to 0.
  . The border offset is the amount that the background and border swells around the text.
  It does not affect the distance between the formatted phrase and the phrases that surround it.
  