just pretty printing in json

src/ui/model/Model.java

@@ -960,6 +960,7 @@ public class Model {
 		GsonBuilder builder = new GsonBuilder();
 		builder.serializeNulls();
 		builder.excludeFieldsWithoutExposeAnnotation();
+		builder.setPrettyPrinting();
 		builder.registerTypeAdapter(AbstractCpsObject.class, new AbstractCpsObjectAdapter());
 		builder.registerTypeAdapter(Position.class, new PositionAdapter());
 		builder.registerTypeAdapter(Color.class, new ColorAdapter());