Fix comments and make formatter private

pillarbox-demo-shared/src/main/java/ch/srgssr/pillarbox/demo/shared/ui/DurationFormatter.kt

@@ -7,7 +7,7 @@ package ch.srgssr.pillarbox.demo.shared.ui
 import kotlin.time.Duration
 
 /**
- * @return a formatter function for displaying the duration based on its length.
+ * @return a formatter function to display the duration based on its length.
  */
 fun Duration.getFormatter(): (Duration) -> String {
     return if (inWholeHours <= 0) DurationFormatter::formatMinutesSeconds else DurationFormatter::formatHourMinutesSeconds
@@ -16,13 +16,13 @@ fun Duration.getFormatter(): (Duration) -> String {
 /**
  * Duration formatter
  */
-object DurationFormatter {
+private object DurationFormatter {
     private const val FORMAT_HOURS_MINUTES_SECONDS = "%02d:%02d:%02d"
     private const val FORMAT_MINUTES_SECONDS = "%02d:%02d"
 
     /**
      * @param duration The duration to format.
-     * @return Format hour minutes seconds
+     * @return The duration formatted as "hh:mm:ss"
      */
     fun formatHourMinutesSeconds(duration: Duration): String {
         return duration.toComponents { hours, minutes, seconds, _ ->
@@ -32,10 +32,10 @@ object DurationFormatter {
 
     /**
      * @param duration The duration to format.
-     * @return Format minutes seconds
+     * @return The duration formatted as "mm:ss"
      */
     fun formatMinutesSeconds(duration: Duration): String {
-        return duration.toComponents { _, minutes, seconds, _ ->
+        return duration.toComponents { minutes, seconds, _ ->
             FORMAT_MINUTES_SECONDS.format(minutes, seconds)
         }
     }