RFR: JDK-8263261 Extend String::translateEscapes to support unicode escapes [v4]

[Raffaello Giulietti]

On Fri, 19 Jan 2024 12:26:51 GMT, Jim Laskey <jlaskey at openjdk.org> wrote:

>> Currently String::translateEscapes does not support unicode escapes, reported as a IllegalArgumentException("Invalid escape sequence: ..."). String::translateEscapes should translate unicode escape sequences to provide full coverage,
>
> Jim Laskey has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update comment

@JimLaskey Please update the test file copyright year as well.
Otherwise LGTM.

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PR Comment: https://git.openjdk.org/jdk/pull/17491#issuecomment-1900405533