Merge pull request #22809 from johnlinp

* pr/22809:
  Polish "Remove PROPAGATION_ prefix in Javadoc"
  Remove PROPAGATION_ prefix in Javadoc

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -40,7 +40,7 @@ public enum Propagation {
 	 * Support a current transaction, execute non-transactionally if none exists.
 	 * Analogous to EJB transaction attribute of the same name.
 	 * <p>Note: For transaction managers with transaction synchronization,
-	 * PROPAGATION_SUPPORTS is slightly different from no transaction at all,
+	 * {@code SUPPORTS} is slightly different from no transaction at all,
 	 * as it defines a transaction scope that synchronization will apply for.
 	 * As a consequence, the same resources (JDBC Connection, Hibernate Session, etc)
 	 * will be shared for the entire specified scope. Note that this depends on
@@ -87,7 +87,7 @@ public enum Propagation {
 
 	/**
 	 * Execute within a nested transaction if a current transaction exists,
-	 * behave like PROPAGATION_REQUIRED else. There is no analogous feature in EJB.
+	 * behave like {@code REQUIRED} else. There is no analogous feature in EJB.
 	 * <p>Note: Actual creation of a nested transaction will only work on specific
 	 * transaction managers. Out of the box, this only applies to the JDBC
 	 * DataSourceTransactionManager when working on a JDBC 3.0 driver.