RFR: 8302590: Add String.indexOf(int ch, int fromIndex, int toIndex) [v8]

[Roger Riggs]

On Fri, 3 Mar 2023 19:38:57 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> Add an `indexOf()` variant allowing to specify both a lower and an upper bound on the search.
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   git commit -m "8302590: Add String.indexOf(int ch, int fromIndex, int toIndex)"
>   
>   Moved and renamed test file to parent folder

Marked as reviewed by rriggs (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12600