Polish

See gh-21130

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/cloud/CloudPlatform.java

@@ -149,7 +149,7 @@ public enum CloudPlatform {
 	 */
 	public boolean isEnforced(Environment environment) {
 		String platform = environment.getProperty("spring.main.cloud-platform");
-		return (platform != null) ? name().equalsIgnoreCase(platform) : false;
+		return name().equalsIgnoreCase(platform);
 	}
 
 	/**

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/ValueObjectBinder.java

@@ -117,10 +117,7 @@ class ValueObjectBinder implements DataObjectBinder {
 	}
 
 	private boolean isEmptyDefaultValueAllowed(Class<?> type) {
-		if (type.isPrimitive() || type.isEnum() || isAggregate(type) || type.getName().startsWith("java.lang")) {
-			return false;
-		}
-		return true;
+		return !type.isPrimitive() && !type.isEnum() && !isAggregate(type) && !type.getName().startsWith("java.lang");
 	}
 
 	private boolean isAggregate(Class<?> type) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/DeferredLog.java

@@ -232,7 +232,6 @@ public class DeferredLog implements Log {
 			return;
 		case FATAL:
 			log.fatal(message, throwable);
-			return;
 		}
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatGracefulShutdown.java

@@ -18,6 +18,7 @@ package org.springframework.boot.web.embedded.tomcat;
 
 import java.time.Duration;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import org.apache.catalina.Container;
@@ -106,9 +107,7 @@ class TomcatGracefulShutdown implements GracefulShutdown {
 	private List<Connector> getConnectors() {
 		List<Connector> connectors = new ArrayList<>();
 		for (Service service : this.tomcat.getServer().findServices()) {
-			for (Connector connector : service.findConnectors()) {
-				connectors.add(connector);
-			}
+			connectors.addAll(Arrays.asList(service.findConnectors()));
 		}
 		return connectors;
 	}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowWebServer.java

@@ -251,11 +251,11 @@ public class UndertowWebServer implements WebServer {
 
 	@Override
 	public boolean shutDownGracefully() {
-		return (this.gracefulShutdown != null) ? this.gracefulShutdown.shutDownGracefully() : false;
+		return (this.gracefulShutdown != null) && this.gracefulShutdown.shutDownGracefully();
 	}
 
 	boolean inGracefulShutdown() {
-		return (this.gracefulShutdown != null) ? this.gracefulShutdown.isShuttingDown() : false;
+		return (this.gracefulShutdown != null) && this.gracefulShutdown.isShuttingDown();
 	}
 
 	/**