8308016: Use snippets in java.io package

Reviewed-by: rriggs

src/java.base/share/classes/java/io/OutputStreamWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -46,10 +46,9 @@ import sun.nio.cs.StreamEncoder;
  * <p> For top efficiency, consider wrapping an OutputStreamWriter within a
  * BufferedWriter so as to avoid frequent converter invocations.  For example:
  *
- * <pre>
- * Writer out
- *   = new BufferedWriter(new OutputStreamWriter(anOutputStream));
- * </pre>
+ * {@snippet lang=java :
+ *     Writer out = new BufferedWriter(new OutputStreamWriter(anOutputStream));
+ * }
  *
  * <p> A <i>surrogate pair</i> is a character represented by a sequence of two
  * {@code char} values: A <i>high</i> surrogate in the range '&#92;uD800' to