Prettier 3.9.4
Playground link

# Options (if any):
--parser css

Input:

div {
  border-radius: attr(br type(<length>+)); 
}

Output:

div {
  border-radius: attr(br type(<length> +));
}

Expected output:

div {
  border-radius: attr(br type(<length>+));
}

There should be no space between the > and the +

Why?

The type(<length>+) is only valid with no space between the > and the + so having the space breaks the functionality. See MDN article on type() or CSSWG spec