RFR: 8267174: Many test files have the wrong Copyright header

Wed Sep 6 07:53:36 UTC 2023

On Tue, 5 Sep 2023 23:15:53 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> One has to wonder about the `**/*_OLD.java` files, but that would be a different cleanup

The IBM double byte charsets were re-implemented in JDK 7. I think the old implementations moved to the test tree so it could be used to test the new/replacement implementations.

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PR Comment: https://git.openjdk.org/jdk/pull/15573#issuecomment-1707845577