rejects parentheses around expressions

[Gsiete]

In this code:

    function fieldUnchanged(field) {
      return field in request.resource.data && field in resource.data && resource.data[field] == request.resource.data[field]
        || !(field in request.resource.data) && !(field in resource.data);
    }

it rejects the parentheses around the in expression in this: !(field in request.resource.data)

[dalgarins]

thanks for testing, issue will be fixed on version: 2.5.6