attrs-heading-last-attr-simple

Last-attr rule: single trailing {} on heading line goes to Section; inline element gets no attrs

§6.1.2

Input

= Heading **bold** {#h}

Output AST

- type: Section
  level: 1
  heading:
    - type: Text
      value: "Heading "
    - type: Strong
      children:
        - type: Text
          value: bold
  attributes:
    - key: id
      value: h