anchor.diff:  
   If a file is found with the extension `.pdfmarks` and the same rootname as the input file, it is used to add metadata to the generated PDF document.
   This file is necessary to preserve the document metadata since Ghostscript will otherwise drop it.
  -That's why Asciidoctor PDF always creates this file in addition to the PDF.
  +That's why {project-name} always creates this file in addition to the PDF.
   
   == Contributing
   
  
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: 
   $ 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
  
  If you don't already have an AsciiDoc document, you can use the [file]_example.adoc_ file found in the examples directory of this project.
  
  ifeval::[{safe-mode-level} >= 20]
  See <<examples/example.adoc#,example.adoc>>.
  endif::[]
  ifeval::[{safe-mode-level} < 20]
  .example.adoc
  [source,asciidoc]
  ....
  include::examples/example.adoc[]
  ....
  endif::[]
  
  It's time to convert the AsciiDoc document directly to PDF.
  
  