Magic callouts don't support formatting

[leemthompo]

Describe the bug

@shainaraskas pointed out that magic callouts for code blocks don't seem to support formatting, unlike their explicit counterparts.

For example:

      PUT my-index-000001
      {
        "settings": {
          "index":{
            "mode":"standard" # This index uses the `standard` index mode
          }
        }
      }

Will render the raw backticks.

Expected behavior

Unless this is intended behavior (which we should document), one would expect formatting to be applied.

Steps to reproduce

1. Write a code block with a magic callout that uses formatting like this:

POST /_query?format=txt
{
  "query": """
    FROM cooking_blog 
    | WHERE description:"fluffy pancakes"  # This has `formatting` and a [link](www.link.com)
    | LIMIT 1000 
  """
}

2. Observe the unformatted output

Tooling

• docs-builder
• migration tooling
• I'm not sure

[leemthompo]

Magic callouts are the best thing by the way, they make annotating code examples (and making updates) so much faster, easier, and ergonomic 😍. Therefore, I want them to ultimately make explicit callouts obsolete. 🙏