spoiler-block-nested-in-named

SpoilerBlock can nest inside a NamedBlock and vice-versa; the two fence families interleave freely

§4.15

Input

:::callout
^^^
hidden inside callout
^^^
:::

Output AST

- type: NamedBlock
  name: callout
  children:
    - type: SpoilerBlock
      children:
        - type: Paragraph
          children:
            - type: Text
              value: hidden inside callout