[AC-6339] Localization Format bug

<resources>
	<string name="myTestLabel1">My test %1$s, test same param %1$s</string>
	<string name="myTestLabel2" formatted="false">My test %1$s, test same param %1$s</string>
</resources>

var count = 0;

function doClick(e) {
	count++;
	let override = false;
	let localizedString = '';
	let label2 = undefined;
	let description = ${count} - ;
	switch (count) {
		case 1:
			description += 'formatted=undefined & 1';
			localizedString = 'myTestLabel1';
			break;
		case 2:
			description += 'formatted=undefined & 2';
			localizedString = 'myTestLabel1';
			label2 = '2';
			break;
		case 3:
			description += 'formatted=false & 1';
			localizedString = 'myTestLabel2';
			break;
		case 4:
			description += 'formatted=false & 2';
			localizedString = 'myTestLabel2';
			label2 = '2';
			break;
		case 5:
			description += 'passing 1 undefined param & 2';
			localizedString = 'myTestLabel2';
			override = true;
			count = 0;
			break;
	}

	let formattedString;
	if (label2 != undefined || override) {
		formattedString = String.format(L(localizedString), '1', label2);
	} else {
		formattedString = String.format(L(localizedString), '1');
	}

	alert(${description} param(s) passed\n--\n${formattedString});
}

$.index.open();