anchor.diff:  
   == Prerequisites
   
  -All that's needed is Ruby 1.9.3 or better (2.2.1 recommended) and a few Ruby Gems, which we explain how to install in the next section.
  +All that's needed is Ruby (1.9.3 or better; 2.2.x recommended) and a few Ruby Gems, which we explain how to install in the next section.
   
   To check you have Ruby available, use the `ruby` command to query the version installed:
   
    $ ruby --version
   
  -If you're using {uri-rvm}[RVM], we recommend creating a new gemset to work with Asciidoctor and {project-name}:
  -
  - $ rvm use 2.2.1@asciidoctor-pdf --create
  +If you're using {uri-rvm}[RVM], we recommend creating a new gemset to work with {project-name}:
  +
  + $ rvm use 2.2@asciidoctor-pdf --create
   
   We like RVM because it keeps the dependencies required by various projects isolated.
   
   == Getting started
   
  -You can get {project-name} by <<installing-the-published-gem,installing the published gem>> or <<development,running the code from source>>.
  +You can get {project-name} by <<install-the-published-gem,installing the published gem>> or <<development,running the code from source>>.
   
   === Install the published gem
   
  
positive.code: * Direct AsciiDoc to PDF conversion
  * <<docs/theming-guide.adoc#,Configuration-driven style and layout>>
  * PDF document outline (i.e., bookmarks)
  * Document metadata (title, authors, subject, keywords, etc)
  * Internal cross reference links
  * Syntax highlighting with CodeRay or Pygments
  * Page numbering
  * Table of contents
  * Customizable running content (header and footer)
  * “Keep together” blocks (i.e., page breaks avoided in certain block content)
  * Orphan section titles avoided
  
negative.code: == Prawn, the majestic PDF generator
  
  {uri-project}[{project-name}] is made possible by an amazing Ruby Gem named Prawn.
  And what a gem it is!
  
  {uri-prawn}[Prawn] is a nimble PDF writer for Ruby.
  More important, it's a hackable platform that offers both high level APIs for the most common needs and low level APIs for bending the document model to accomodate special circumstances.
  