Polish "Add publishUnchangedMeters StatsD support"

Closes gh-11967

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/statsd/StatsdProperties.java

@@ -59,8 +59,8 @@ public class StatsdProperties {
 
 	/**
 	 * How often gauges will be polled. When a gauge is polled, its value is recalculated
-	 * and if the value has changed (or publishUnchangedMeters is true),
-	 * it is sent to the StatsD server.
+	 * and if the value has changed (or publishUnchangedMeters is true), it is sent to the
+	 * StatsD server.
 	 */
 	private Duration pollingFrequency = Duration.ofSeconds(10);
 
@@ -72,7 +72,7 @@ public class StatsdProperties {
 	/**
 	 * Send unchanged meters to the StatsD server.
 	 */
-	private Boolean publishUnchangedMeters = true;
+	private Boolean publishUnchangedMeters;
 
 	public Boolean getEnabled() {
 		return this.enabled;
@@ -137,4 +137,5 @@ public class StatsdProperties {
 	public void setPublishUnchangedMeters(Boolean publishUnchangedMeters) {
 		this.publishUnchangedMeters = publishUnchangedMeters;
 	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/statsd/StatsdPropertiesConfigAdapter.java

@@ -80,6 +80,8 @@ public class StatsdPropertiesConfigAdapter
 
 	@Override
 	public boolean publishUnchangedMeters() {
-		return get(StatsdProperties::getPublishUnchangedMeters, StatsdConfig.super::publishUnchangedMeters);
+		return get(StatsdProperties::getPublishUnchangedMeters,
+				StatsdConfig.super::publishUnchangedMeters);
 	}
+
 }