Consistently refer to FlushMode.MANUAL instead of outdated NEVER

Closes spring-projectsgh-25158

spring-orm/src/main/java/org/springframework/orm/hibernate5/support/OpenSessionInViewFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -51,11 +51,11 @@
  * as well as for non-transactional execution (if configured appropriately).
  *
  * <p><b>NOTE</b>: This filter will by default <i>not</i> flush the Hibernate Session,
- * with the flush mode set to {@code FlushMode.NEVER}. It assumes to be used
+ * with the flush mode set to {@code FlushMode.MANUAL}. It assumes to be used
  * in combination with service layer transactions that care for the flushing: The
  * active transaction manager will temporarily change the flush mode to
  * {@code FlushMode.AUTO} during a read-write transaction, with the flush
- * mode reset to {@code FlushMode.NEVER} at the end of each transaction.
+ * mode reset to {@code FlushMode.MANUAL} at the end of each transaction.
  *
  * <p><b>WARNING:</b> Applying this filter to existing logic can cause issues that
  * have not appeared before, through the use of a single Hibernate Session for the

spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -383,7 +383,7 @@ public static void setCurrentTransactionReadOnly(boolean readOnly) {
 	 * as argument for the {@code beforeCommit} callback, to be able
 	 * to suppress change detection on commit. The present method is meant
 	 * to be used for earlier read-only checks, for example to set the
-	 * flush mode of a Hibernate Session to "FlushMode.NEVER" upfront.
+	 * flush mode of a Hibernate Session to "FlushMode.MANUAL" upfront.
 	 * @see org.springframework.transaction.TransactionDefinition#isReadOnly()
 	 * @see TransactionSynchronization#beforeCommit(boolean)
 	 */