anchor.diff:  
   . `<name>` can be `note`, `tip`, `warning`, `important`, or `caution`.
   The subkeys in the icon category cannot be flattened (e.g., `tip_name: fa-lightbulb-o` is not valid syntax).
  -. See the `.yml` files in the https://github.com/jessedoyle/prawn-icon/tree/master/data/fonts[prawn-icon repository] for a list of valid names.
  +. Required.
  +See the `.yml` files in the https://github.com/jessedoyle/prawn-icon/tree/master/data/fonts[prawn-icon repository] for a list of valid icon names.
   The prefix (e.g., `fa-`) determines which font set to use.
   
   === Image
  
positive.code:   label:
      text_transform: lowercase
  
  3+|*Key Prefix:* admonition_icon_<name>^[1]^
  
  |name
  
negative.code: |admonition:
    padding: [0, 12, 0, 12]
  
  3+|*Key Prefix:* admonition_label, admonition_label_<name>^[1]^
  
  |font_color
  