A lab for testing and demonstrating Asciidoctor extensions. Please do not use this code in production. If you want to use one of these extensions in your application, create a new project, import the code, and distribute it as a RubyGem. You can then request to make it a top-level project under the Asciidoctor organization.
This is a straight up port of https://github.com/bmuschko/asciidoctorj-tabbed-code-extension to ruby.
You can test it by running:
asciidoctor -r ./lib/tabbed-code.rb lib/tabbed-code/sample.adoc; open lib/tabbed-code/sample.html