anchor.diff:  
    $ ruby ./bin/asciidoctor-pdf -v
   
  +or
  +
  + $ bundle exec ./bin/asciidoctor-pdf -v
  +
   If you see the version of {project-name} printed, you're ready to use {project-name}!
   
  -If you get an error message--and you're not using a Ruby manager like RVM--you may need to invoke the script through `bundle exec`:
  -
  - $ bundle exec ./bin/asciidoctor-pdf -v
  -
  -TIP: For best results, be sure to use `bundle exec` whenever invoking the `./bin/asciidoctor-pdf` script .
  +CAUTION: If you get an error message--and you're not using a Ruby manager like RVM--you may need to invoke the script through `bundle exec`:
  +For best results, be sure to always use `bundle exec` whenever invoking the `./bin/asciidoctor-pdf` script in development mode.
   
   [[resources,Links]]
   == Resources
  
positive.code:  $ asciidoctor-pdf -v
  
  If you see the version of {project-name} printed, you're ready to use {project-name}.
  Let's grab an AsciiDoc document to distill and start putting {project-name} to use!
  
  === An example AsciiDoc document
  
negative.code: 
  The layout and styling of the PDF is driven by a YAML configuration file.
  To learn how the theming system works and how to create and apply custom themes, refer to the <<docs/theming-guide.adoc#,Asciidoctor PDF Theme Guide>>.
  You can use the built-in theme files, which you can find in the [file]_data/themes_ directory, as examples.
  
  == Optional scripts
  
  