RFR: 8249867: xml declaration is not followed by a newline

[Naoto Sato]

On Tue, 12 Jan 2021 01:24:38 GMT, Joe Wang <joehw at openjdk.org> wrote:

> Please review a patch to add an explicit control over whether a newline should be added after the XML header. This is done by adding a DOM LSSerializer property "jdk-is-standalone" and System property "jdk.xml.isStandalone". 
> 
> This change addresses an incompatibility introduced during 7u4 as an update to Xalan 2.7.1.

Marked as reviewed by naoto (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/2041