Demos

1. This is `demos/index.adoc`

index.ron in this directory is:

// RON format (with or without outermost parentheses)

summary: ("", "index.adoc"),
//        ^ (optional) override the title
items: [
    File("", "demo.adoc"),
    File("Demo (diagrams)", "demo_diagrams.adoc"),
],

Titles can be skipped as this: File("", "demo.adoc"). Then it is automatically extracted from the AsciiDoc file.