style(demo): fix demo code formatting

Author: elPeiretti

src/test/java/com/flowingcode/vaadin/addons/localecombobox/BaseLocaleComboBoxDemo.java

@@ -41,7 +41,7 @@ protected HorizontalLayout createHorizontalContainer(String title, LocaleComboBo
     container.expand(combo);
     return container;
   }
-  
+
   protected HorizontalLayout createHorizontalContainer(Component component, LocaleComboBox combo) {
     HorizontalLayout container = new HorizontalLayout();
     container.setWidthFull();

src/test/java/com/flowingcode/vaadin/addons/localecombobox/DisplayModeDemo.java

@@ -38,7 +38,7 @@ public DisplayModeDemo() {
     List<Locale> localeList =
         Arrays.stream(Locale.getAvailableLocales()).filter(loc -> !loc.getDisplayName().isBlank())
             .sorted((l1, l2) -> l1.getDisplayName().compareTo(l2.getDisplayName())).toList();
-    
+
     LocaleComboBox defaultDisplayLocale = new LocaleComboBox(localeList);
     LocaleComboBox koreanLocaleCombo = new LocaleComboBox();
     LocaleComboBox selectedLocaleCombo = new LocaleComboBox(localeList);

src/test/java/com/flowingcode/vaadin/addons/localecombobox/RenderingDemo.java

@@ -35,11 +35,11 @@ public RenderingDemo() {
     LocaleComboBox defaultLocaleCombo = new LocaleComboBox();
     LocaleComboBox flagsLocaleCombo = new LocaleComboBox();
     Checkbox checkbox = new Checkbox("Render flags");
-    
+
     defaultLocaleCombo.setValue(Locale.ITALY);
     flagsLocaleCombo.setValue(Locale.ITALY);
     checkbox.setValue(true);
-    
+
     /*
      * You can choose whether the flags should be displayed alongside the locale names by using the
      * setHasFlag method