cleanup, docs

site/doc/pages/2_DValue_has.txt

@@ -15,6 +15,6 @@ return value : true when the dereferenced value is map-shaped and contains the k
 Checks for a child key without creating it. Returns false for scalars and missing keys.
 
 :example
-DValue user;
-user["name"] = "Ada";
-print(user.has("name") ? "yes\n" : "no\n");
+DValue u;
+u["name"] = "Ada";
+print(u.has("name") ? "has name" : "no name", " / ", u.has("age") ? "has age" : "no age", "\n");