anchor.diff:  Each chapter must start with a single-line, level-0 section.
   The section title becomes the chapter title (also used as the TOC entry) and the section ID determines the chapter file name inside the EPUB3 archive.
   In other words, you must be explicit.
  -Asciidoctor EPUB3 will not try to guess.
  +{project-name} will not try to guess.
   If your AsciiDoc document is not structured in this way, you'll need to change it to use the {project-name} converter successfully.
   
   You can think of the master document as the spine of the book and the include directives the individual items being bound together.
  
positive.code: = Asciidoctor EPUB3: A _native_ EPUB3 converter for AsciiDoc
  Dan Allen <https://github.com/mojavelinux[@mojavelinux]>; Sarah White <https://github.com/graphitefriction[@graphitefriction]>
  // Settings:
  :experimental:
  
negative.code: 
  == Development
  
  To help develop {project-name}, or to simply test drive the development version, you need to get the source from GitHub.
  Follow the instructions below to learn how to clone the source and run it from your local copy.
  
  === Retrieve the Source Code
  