quote-block-strong-empty-run-of-four

**** with no word content on either side produces an empty Strong node (N=4 rule, cf. emphasis-empty) followed by literal text, inside a QuoteBlock; the trailing > is plain text, not a new quote

§4.6 · source

Input

> **** >

Output AST

- type: QuoteBlock
  children:
    - type: Paragraph
      children:
        - type: Strong
        - type: Text
          value: " >"