mdbook/tests/gui/books/heading-nav/src/markup.md

Headings with markup

Tests that heading markup gets copied to the sidebar.

Heading with code or italic or bold or strike

Basic markup should be copied.

Heading with a link

Probably not super-wise to have headings with links, but at least they shouldn't explode.

Heading with a custom id

Make sure navigation works on a custom id.

Heading with html

What happens if there is inline HTML?