public static NumericShaper getContextualShaper(int ranges) {

does not validate the ranges are defined ranges and just silently stores them,
which creates problems later in some cases of hashCode/equals

This in contrast to
    public static NumericShaper getShaper(Range singleRange) {

which throws an IllegalArgumentException if the range is not a legal range.

I think that rather than having
    public static NumericShaper getContextualShaper(int ranges) {
throw an exception, we can just discard the illegal values. This would be the more compatible change.
Likely this should be specified.

This was noticed after JDK-8365077 but is pre-existing.