markdown bindgen generates invalid HTML

[kavoc-brown]

Input WIT

package a:b;

world w {
  export x: interface {
    record r {
      f: u32,
    }

    g: func(a: r);
  }
}

Run "$WIT_BINDGEN" markdown --out-dir "$OUT" /tmp/poc.wit.

The generated html contains nested anchors, which is invalid.

Environment

• wit-bindgen-cli: 0.47.0
• OS: Ubuntu 22.04.5 LTS (x86_64)