anchor.diff:      options.addStringOption "-attribute", // <2>
               "name=${project.name}," +
               "version=${project.version}," +
  -            "title-link=http://example.com[${project.name} ${project.version}]")
  +            "title-link=https://example.com[${project.name} ${project.version}]")
   }
   ----
   <1> Option names passed to Gradle's `javadoc` task must omit the leading "-", so here "-base-dir" means "--base-dir".
  
positive.code: This can be used for conditionally selecting content when using the same Asciidoc file for Javadoc and other documentation.
  
  --attributes-file <file>::
  Reads http://asciidoctor.org/docs/user-manual/#attributes[document attributes^] from an Asciidoc file.
  The attributes will be expanded in Javadoc comments.
  +
  If `<file>` is a relative path name, it is assumed to be relative to the `--base-dir` directory.
  
negative.code: :asciidoclet-version: 1.5.6
  :asciidoclet-src-ref: https://github.com/asciidoctor/asciidoclet
  :asciidoclet-javadoc-ref: https://www.javadoc.io/doc/org.asciidoctor/asciidoclet/{asciidoclet-version}
  :asciidoclet-release-ref: https://asciidoctor.org/news/2014/09/09/asciidoclet-1.5.0-released/
  :asciidoc-ref: https://asciidoc.org
  :asciidoctor-java-ref: https://asciidoctor.org/docs/install-and-use-asciidoctor-java-integration/
  :asciidoclet-issues-ref: https://github.com/asciidoctor/asciidoclet/issues
  :asciidoctor-src-ref: https://github.com/asciidoctor/asciidoctor
  :asciidoctor-java-src-ref: https://github.com/asciidoctor/asciidoctor-java-integration
  :discuss-ref: https://discuss.asciidoctor.org/
  
  ifdef::badges[]
  image:https://img.shields.io/travis/asciidoctor/asciidoclet/master.svg["Build Status", link="https://travis-ci.org/asciidoctor/asciidoclet"]
  image:https://img.shields.io/badge/javadoc.io-{asciidoclet-version}-blue.svg[Javadoc, link={asciidoclet-javadoc-ref}]
  endif::[]
  
  