to family

src/validator/rules/polymorphism.rs

@@ -21,7 +21,7 @@ impl<'a> ValidationContext<'a> {
       if conflicts {
         result.errors.push(ValidationError {
           code: "INVALID_SCHEMA".to_string(),
-          message: "$family must be used exclusively without other constraints".to_string(),
+          message: "family must be used exclusively without other constraints".to_string(),
           path: self.path.to_string(),
         });
         return Ok(false);