<i18n dev> RFR: 8347146: Convert IncludeLocalesPluginTest to use JUnit [v2]

[Justin Lu]

On Thu, 9 Jan 2025 22:44:15 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> A simple refinement to the test makes diagnosing failures easier.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addresses review comments

Marked as reviewed by jlu (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/23016#pullrequestreview-2541098891