src/vs/workbench/services/label/common/labelService.ts/LabelService/appendSeparatorIfMissing
class LabelService:	private appendSeparatorIfMissing(label: string, formatting: ResourceLabelFormatting): string {
		let appendedLabel = label;
		if (!label.endsWith(formatting.separator)) {
			appendedLabel += formatting.separator;
		}
		return appendedLabel;
	}