RFR: 8253285: Some java/util/StringJoiner tests do not explicitly specify required -XX:+CompactStrings

[Andrew Leonard]

On Thu, 17 Sep 2020 13:09:09 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Signed-off-by: Andrew Leonard <andrew_m_leonard at uk.ibm.com>
>
> Marked as reviewed by rriggs (Reviewer).

@RogerRiggs thanks Roger, please can you Sponsor this PR ? thanks

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PR: https://git.openjdk.java.net/jdk/pull/223