anchor.diff:  //  font_style: normal
   |===
   
  -=== Literal inline
  +=== Literal (Inline)
   
   The keys in this category are used for inline monospaced text in prose and table cells.
   
  
positive.code: CAUTION: At the time of this writing, you cannot use the bundled fonts if you define your own custom fonts.
  This limitation may be lifted in the future.
  
  === Custom fonts
  
  The limited character set of WINANSI, or the bland look of the built-in fonts, may motivate you to load your own font.
  Custom fonts can enhance the look of your PDF theme substantially.
  
negative.code: Use the `noheader` and `nofooter` attributes to disable the running header and footer, respectively, from the document.
  
  ////
  == Resources for Extending Asciidoctor PDF
  
  * http://www.sitepoint.com/hackable-pdf-typesetting-in-ruby-with-prawn[Hackable PDF typesetting in Ruby with Prawn]
  ////
  