Enable AsciiDoc syntax highlighting (using Rouge)
What does this MR do?
Enable syntax highlighting for AsciiDoc. Basically we generate the following HTML for source blocks:
<pre><code lang="LANG">some code\n</code></pre>
This syntax is compatible with GitLab Flavored Markdown (GFM).
We can then use the
Banzai::Filter::SyntaxHighlightFilter in the AsciiDoc pipeline.
Please note that callouts are not rendered correctly because the
SyntaxHighlightFilter is designed for Markdown (which does not have this feature).
Since Asciidoctor provides a built-in syntax highlighter based on Rouge we could potentially configure
source-highlighter' => 'rouge' to let Asciidoctor do the syntax highlighting. But this approach only works if the sanitization does not remove CSS classes in the
pre > code > span elements.
resolves #32635 (closed)