Use consistent block style

Update all code to use a consistent block style.

Issue: SPR-16968

spring-tx/src/main/java/org/springframework/transaction/annotation/Isolation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,8 +81,12 @@ public enum Isolation {
 	private final int value;
 
 
-	Isolation(int value) { this.value = value; }
+	Isolation(int value) {
+		this.value = value;
+	}
 
-	public int value() { return this.value; }
+	public int value() {
+		return this.value;
+	}
 
 }

spring-tx/src/main/java/org/springframework/transaction/annotation/Propagation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -100,8 +100,12 @@ public enum Propagation {
 	private final int value;
 
 
-	Propagation(int value) { this.value = value; }
+	Propagation(int value) {
+		this.value = value;
+	}
 
-	public int value() { return this.value; }
+	public int value() {
+		return this.value;
+	}
 
 }

spring-tx/src/main/java/org/springframework/transaction/interceptor/TransactionAspectSupport.java

@@ -507,9 +507,10 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 		else {
 			// The TransactionInfo.hasTransaction() method will return false. We created it only
 			// to preserve the integrity of the ThreadLocal stack maintained in this class.
-			if (logger.isTraceEnabled())
+			if (logger.isTraceEnabled()) {
 				logger.trace("Don't need to create transaction for [" + joinpointIdentification +
 						"]: This method isn't transactional.");
+			}
 		}
 
 		// We always bind the TransactionInfo to the thread, even if we didn't create