RFR: 8280470: Confusing instanceof check in HijrahChronology.range

[Roger Riggs]

On Mon, 17 Jan 2022 21:02:35 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:

> Parameter `ChronoField field` is checked by `if (field instanceof ChronoField)`. Such check is confusing, because only one case, when this could be `false` is when `field == null`.
> But if condition is not satisfied we will get immediate NullPointerException anyway in `return field.range();`.

Looks fine;  I have no idea how that came to be; there was a lot of copy paste in the initial check-in of java.time.

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Marked as reviewed by rriggs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7118