Function guide 

pub fn guide(src: &str, links: Option<Links<'_>>) -> String

A written guide as HTML: the subset of Markdown the guides in docs/ actually use.

Headings, fenced code, block quotes, tables, bullets, and inline code, emphasis and links. Deliberately not a Markdown implementation — docs/07 §7.2 lists mdBook for the eventual book, and a guide is not a book. What it is instead is checked: the guide it renders is the one beck-cli/tests/getting_started.rs compiles and runs, so the published page cannot describe a program that does not work.

Anything it does not understand is emitted as escaped text rather than dropped, which is the safe direction: a page with a stray asterisk is a page, and a page missing a paragraph is a lie.