src/vs/base/common/keybindingLabels.ts/_simpleAsString
function _simpleAsString(modifiers: Modifiers, key: string, labels: ModifierLabels): string {
	if (key === null) {
		return '';
	}

	const result: string[] = [];

	// translate modifier keys: Ctrl-Shift-Alt-Meta
	if (modifiers.ctrlKey) {
		result.push(labels.ctrlKey);
	}

	if (modifiers.shiftKey) {
		result.push(labels.shiftKey);
	}

	if (modifiers.altKey) {
		result.push(labels.altKey);
	}

	if (modifiers.metaKey) {
		result.push(labels.metaKey);
	}

	// the actual key
	if (key !== '') {
		result.push(key);
	}

	return result.join(labels.separator);
}