message: Do not serialize the default value of expression question displayStyle property "none".
diff: @@ -324,7 +324,7 @@ JsonObject.metaData.addClass(
  { name: "format", serializationProperty: "locFormat" },
  {
  name: "displayStyle",
  - default: "decimal",
  + default: "none",
  choices: ["none", "decimal", "currency", "percent"]
  },
  {
  