[jdk16u] RFR: 8249867: xml declaration is not followed by a newline

[Kiran Sidhartha Ravikumar]

Backport JDK-8249867 to 16u. Fix verified

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Commit messages:
 - Backport 69ee314b63a9f260e3dcbe9ccd67ddc4faec3ba0

Changes: https://git.openjdk.java.net/jdk16u/pull/24/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=24&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8249867
  Stats: 479 lines in 5 files changed: 428 ins; 2 del; 49 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/24.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/24/head:pull/24

PR: https://git.openjdk.java.net/jdk16u/pull/24