README.adoc in asciidoctor-fb2-0.6.0 vs README.adoc in asciidoctor-fb2-0.7.0

@@ -1,17 +1,18 @@
 = {project-name}
 Marat Radchenko <[e-mail]>
 :project-name: Asciidoctor FB2
 :project-handle: asciidoctor-fb2
 :slug: asciidoctor/{project-handle}
+:source-highlighter: rouge
 :uri-project: https://github.com/{slug}
 :uri-ci: {uri-project}/actions?query=branch%3Amaster
 :uri-gem: https://rubygems.org/gems/{project-handle}
 
 image:https://img.shields.io/badge/zulip-join_chat-brightgreen.svg[project chat,link=https://asciidoctor.zulipchat.com/]
 image:https://img.shields.io/gem/v/{project-handle}.svg[Latest Release,link={uri-gem}]
-image:{uri-project}/workflows/CI/badge.svg?branch=master[Build Status,link={uri-ci}]
+image:{uri-project}/workflows/CI/badge.svg?branch=main[Build Status,link={uri-ci}]
 
 {project-name} is an Asciidoctor extension for converting AsciiDoc documents directly to the FB2 e-book format.
 
 == Installation
 
@@ -37,10 +38,10 @@
 Converting an AsciiDoc document to FB2 is as simple as passing your document to the `{project-handle}` command.
 This command should be available on your PATH if you installed the `{project-handle}` gem.
 Otherwise, you can find the command in the [path]_bin_ folder of the project.
 We also recommend specifying an output directory using the `-D` option flag.
 
-[source,shell script]
+[source,shell]
 ----
 $ asciidoctor-fb2 -D output path/to/book.adoc
 ----
 
 When the script completes, you'll see the file [file]_book.fb2.zip_ appear in the [path]_output_ directory.