> how is it better (superior) than markdown?
In nearly every way. It has been thought out properly from the start. If you want to do something a little bit advanced it has an elegant solution. Here is just a list off the top of my head:
- Precise image placement
- Document pre-processor (similar to YAML but more powerful)
- Table of Content
- Great bibliography support and footnotes
- Embeds backed in
- Good referencing syntax
- Admonition sections
- Precise image placement
- Proper syntax for quoting people
- Add containers easily to each section
- Plugins to generate nice semantic HTML (very easy to theme with CSS)
- You can use it to write a book
- Did I mention precise image placement?
A quick intro is here:
https://asciidoctor.org/docs/what-is-asciidoc/
More detailed guide here:
https://asciidoctor.org/docs/asciidoc-writers-guide/
Both pages are written in normal AsciiDoc (i.e. no extra plugins are used. It is what you get out of the box) and use the "default" HTML output.