anchor.diff:    border_width: 0.75
   
   |font_color
  -|<<colors,Color>>
  +|<<colors,Color>> +
  +(default: _inherit_)
   |code:
     font_color: #333333
   
  
positive.code: 
  |border_radius
  |<<values,Number>> +
  (default: 0)
  |code:
    border_radius: 4
  
  
negative.code: 
  |border_radius
  |<<values,Number>> +
  (default: _not set_)
  |example:
    border_radius: 4
  
  