RFR: JDK-8263261 Extend String::translateEscapes to support unicode escapes [v13]

[Roger Riggs]

On Fri, 26 Jan 2024 17:36:52 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:
> 
>   Requested changes

Marked as reviewed by rriggs (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17491#pullrequestreview-1848993761