plural i18n.tr doesn't work as per documentation

[Michał Sawicz]

http://developer.ubuntu.com/api/ubuntu-12.10/qml/mobile/qml-ubuntu-components0-i18n.html#tr-method-2

The doc states:
=======

string i18n::tr(string singular, string plural, int n)

Translate the given input string singular or plural (depending on the number of items n) using gettext. Should be called like this: > tr("%n file", "%n files", count)

But the following snippet:
==========================

import QtQuick 2.0
import Ubuntu.Components 0.1

Text {
    text: i18n.tr("singular: %n", "plural: %n", 1) + "<br>" + i18n.tr("singular: %n", "plural: %n", 2)
}

Displays:
---------

singular: %n
plural: %n

A simple workaround:
====================

import QtQuick 2.0
import Ubuntu.Components 0.1

Text {
    text: i18n.tr("singular: %1", "plural: %1", 1).arg(1) + "<br>" + i18n.tr("singular: %1", "plural: %1", 2).arg(2)
}

Displays, correctly:
--------------------
singular: 1
plural: 2