That's a follow-up for ✨ Add a formatter to represent JSON data in human readable form Needs work
The pretty formatter does not escape HTML code. That may lead to a security issue if JSON data comes from untrusted source.
Active
1.0
Code
Turns out that default "Plain text" formatter has same bug.
Submitted a MR for plain text formatter.
I don't know how is JsonMarkup supposed to work here.