RFR: 8037397: Lost nested character class after intersection && [v3]

[Roger Riggs]

On Fri, 2 Apr 2021 15:48:50 GMT, Ian Graves <igraves at openjdk.org> wrote:

>> Bug fix with the intersection `&&` operator in regex patterns. In JDK-8037397, some character classes on the right hand side of the operator are dropped in cases where nested `[..]` classes are used with non "nested" ones.
>
> Ian Graves has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adding a test.

Update copyright before push.

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Marked as reviewed by rriggs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3291