RFR: 8370628: Rename BigInteger::nthRoot to rootn, and similarly for nthRootAndRemainder [v2]

[Joe Darcy]

On Sat, 25 Oct 2025 08:29:33 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> The reason for this last minute renaming is to more closely adhere to the IEEE 754 nomenclature, even in the BigInteger class (and in the internal MutableBigInteger).
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename invocations in tests.

Marked as reviewed by darcy (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27980#pullrequestreview-3380172179