OO-3819: Format year part with leading zeros

src/main/java/org/olat/modules/quality/analysis/ui/AnalysisUIFactory.java

@@ -51,6 +51,11 @@ class AnalysisUIFactory {
 		return 0;
 	}
 	
+	
+	static String formatYearPart(int yearPart) {
+		return String.format("%02d", yearPart);
+	}
+	
 	static String formatSliderLabel(Slider slider) {
 		boolean hasStartLabel = StringHelper.containsNonWhitespace(slider.getStartLabel());
 		boolean hasEndLabel = StringHelper.containsNonWhitespace(slider.getEndLabel());

src/main/java/org/olat/modules/quality/analysis/ui/SliderTrendController.java

@@ -147,7 +147,7 @@ public class SliderTrendController extends FormBasicController {
 			String header = TemporalKey.NO_VALUE == temporalKey.getYearPart()
 					? translate("slider.trend.table.year", new String[] { Integer.toString(temporalKey.getYear()) })
 					: translate("slider.trend.table.year.part", new String[] {
-							Integer.toString(temporalKey.getYear()), Integer.toString(temporalKey.getYearPart()) });
+							Integer.toString(temporalKey.getYear()), AnalysisUIFactory.formatYearPart(temporalKey.getYearPart()) });
 			headers.add(header);
 		}
 		return headers;