anchor.diff:    font_size: 12
     line_height_length: 17
     line_height: $base_line_height_length / $base_font_size
  -vertical_rhythm: $base_line_height_length
  +vertical_spacing: $base_line_height_length
   heading:
     font_color: #262626
     font_size: 17
     font_style: bold
     line_height: 1.2
  -  margin_bottom: $vertical_rhythm
  +  margin_bottom: $vertical_spacing
   link:
     font_color: #002FA7
   outline_list:
  
positive.code: |vertical_spacing: 10
  |===
  
  //NOTE: Vertical and horizontal rhythm are used for vertical and horizontal spacing, respectively, when there a specific theme key is not defined for a certain purpose.
  //These keys predated the CSS-style theme system and are planned to be phased out.
  
  === Link
  
  [cols="3,3,5m"]
  
negative.code: 
  |heading_margin_top
  |<<measurement-units,measurement>>
  |margin_top: $vertical_spacing * 0.2
  
  |heading_margin_bottom
  |<<measurement-units,measurement>>
  