Polish

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/logging/LoggersEndpointAutoConfigurationTests.java

@@ -58,9 +58,8 @@ public class LoggersEndpointAutoConfigurationTests {
 		this.contextRunner
 				.withSystemProperties(
 						"org.springframework.boot.logging.LoggingSystem=none")
-				.run((context) -> {
-					assertThat(context).doesNotHaveBean(LoggersEndpoint.class);
-				});
+				.run((context) -> assertThat(context)
+						.doesNotHaveBean(LoggersEndpoint.class));
 	}
 
 	@Configuration

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/MetricsRun.java

@@ -75,7 +75,7 @@ public final class MetricsRun {
 		propertyValues.add("management.metrics.use-global-registry=false");
 		List<String> keep = Arrays.asList(implementations);
 		IMPLEMENTATIONS.stream()
-				.filter((implementation) -> !keep.contains(implementations))
+				.filter((implementation) -> !keep.contains(implementation))
 				.map(MetricsRun::disableExport).forEach(propertyValues::add);
 		return propertyValues.toArray(new String[0]);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/RouterFunctionMetrics.java

@@ -127,11 +127,9 @@ public class RouterFunctionMetrics {
 		public Mono<ServerResponse> filter(ServerRequest request,
 				HandlerFunction<ServerResponse> next) {
 			long start = System.nanoTime();
-			return next.handle(request).doOnSuccess((response) -> {
-				timer(start, request, response);
-			}).doOnError((error) -> {
-				timer(start, request, null);
-			});
+			return next.handle(request)
+					.doOnSuccess((response) -> timer(start, request, response))
+					.doOnError((error) -> timer(start, request, null));
 		}
 
 		private Iterable<Tag> getDefaultTags(ServerRequest request,