[jdk18u] RFR: 8281093: Violating Attribute-Value Normalization in the XML specification 1.0

[Ravi Reddy]

Clean backport of https://github.com/openjdk/jdk/commit/3996782c5af7b0396d5133fab457c507758d9340 to jdk18u.

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Commit messages:
 - 8281093: Violating Attribute-Value Normalization in the XML specification 1.0

Changes: https://git.openjdk.java.net/jdk18u/pull/35/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=35&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281093
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/35.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/35/head:pull/35

PR: https://git.openjdk.java.net/jdk18u/pull/35