tree ce4c1c57705d2b3c944a56a6934263f0d39820e5
parent 967f1c3e50a435703037f9957be3c94e9d432546
author Tamas Cservenak <tamas@cservenak.net> 1684230848 +0200
committer Tamas Cservenak <tamas@cservenak.net> 1684230848 +0200

[ARCHETYPE-637] Fix PomUtils pretty-print issue on Java 9+

As of Java 9, the Transformer class's pretty-print feature doesn't define the actual format. Therefore, whitespace-only nodes will be outputted as well. This has been discussed in this [JDK bug ticket](https://bugs.openjdk.java.net/browse/JDK-8262285?attachmentViewMode=list). Also, [Java 9's release note](https://www.oracle.com/java/technologies/javase/9-notes.html) has explained this in the xml/jaxp section.

If we want our pretty-print method to always generate the same format under various Java versions, we need to provide a stylesheet file.

ref：

   https://bugs.openjdk.java.net/browse/JDK-8262285?attachmentViewMode=list

   https://www.baeldung.com/java-pretty-print-xml#pretty-printing-xml-with-the-transformer-class

Co-authored-by: Moderne <team@moderne.io>

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https://issues.apache.org/jira/browse/ARCHETYPE-637