anchor.diff:  3+|*Key Prefix:* literal
   
   |font_color
  -|<<colors,Color>>
  +|<<colors,Color>> +
  +(default: _inherit_)
   |literal:
     font_color: #b12146
   
  
positive.code: |toc:
    font_style: bold
  
  |line_height
  |<<values,Number>> +
  (default: 1.4)
  
negative.code: * font_color
  * font_size
  * font_style
  * text_transform
  * line_height (currently some exceptions)
  * margin_bottom (if not specified, defaults to $vertical_spacing)
  
  .Heading Inheritance
  ****
  