Fixes data-fragment-index on code block

[jtama]

Links #532

[ggrossetie]

Thanks!
Could you please update this test source-highlightjs-languages:source-highlightjs-languages (see CI logs)

[jtama]

Forced push the changes. Tests are passing on my machine 😀

[jtama]

Do you want a sample of it in action ?

[ggrossetie]

Forced push the changes. Tests are passing on my machine

And it also works on the CI 😉

Do you want a sample of it in action ?

Yes, that would be great! Please add an example in https://github.com/asciidoctor/asciidoctor-reveal.js/blob/master/examples/release-5.2.adoc (it will be published by Netlify: https://deploy-preview-533--asciidoctor-revealjs-examples.netlify.app/release-5.2)

[jtama]

Done !

[ggrossetie]

That's very cool! 👍🏻
https://deploy-preview-533--asciidoctor-revealjs-examples.netlify.app/release-5.2#/_synchronising_step_by_step_syntax_highlighting