imageblock-inline-alt

ImageBlock alt is parsed by inline rules; emphasis and plain text are valid alt content

§4.9

Input

![A __bold__ caption](photos/shot.jpg)

Output AST

- type: ImageBlock
  alt:
    - type: Text
      value: "A "
    - type: Emphasis
      children:
        - type: Text
          value: bold
    - type: Text
      value: " caption"
  src: photos/shot.jpg