RFR: 8313612: Use JUnit in lib-test/jdk tests [v3]

[Christian Stein]

On Thu, 7 Sep 2023 07:15:06 GMT, Qing Xiao <xqoasis at openjdk.org> wrote:

>> Modified all tests under lib-test/jdk to use JUnit
>
> Qing Xiao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Change test static method to instance method

test/lib-test/jdk/test/lib/format/ArrayDiffTest.java line 2:

> 1: /*
> 2:  * Copyright (c) 2020, 2021, 2023, Oracle and/or its affiliates. All rights reserved.

Suggestion:

 * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15131#discussion_r1329896061