Fixed failing test.

Signed-off-by: Tomáš Kraus <[email protected]>

Author: Tomáš Kraus

data/tests/model/src/main/java/io/helidon/data/tests/model/Pokemon.java

@@ -168,8 +168,8 @@ public String toString() {
         sb.append(hp);
         sb.append(", alive=");
         sb.append(alive);
-        sb.append(", keeper=");
-        sb.append(trainer.toString());
+        sb.append(", trainer=");
+        sb.append(trainer != null ? trainer.toString() : "null");
         sb.append(", types=[");
         boolean first = true;
         for (Type type : types) {