error: Expected comma after condition.

       Correct syntax: guard!(condition, status_code, "message")

       Example:
       guard!(!name.is_empty(), 400, "Name is required");

       Original error: expected `,`
 --> tests/ui/dx/guard_missing_comma.rs:6:29
  |
6 |     guard!(!name.is_empty() 400, "Name required");
  |                             ^^^
