While deparsing GNU R structures we need to expand attributes.

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RDeparse.java

@@ -1061,7 +1061,7 @@ public class RDeparse {
                 root = list.getDataAtAsObject(0);
             }
         }
-        return new DeparseVisitor(false, 80, true, 0, -1, constants).process(root).getContents();
+        return new DeparseVisitor(false, 80, true, SHOWATTRIBUTES, -1, constants).process(root).getContents();
     }
 
     @TruffleBoundary