✨ Add SequenceSet methods for querying about duplicates #384
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This splits off "normalized" vs "order preserving" methods in the "What's here?" sections.
Adds three new SequenceSet methods for querying about "duplicates": * `#has_duplicates?`: Returns whether the ordered entries contain any duplicates. * `#count_duplicates`: Returns the count of duplicates in the ordered entries. * `#count_with_duplicates`: Returns the count of numbers in the ordered entries, including any repeated numbers. This is useful for adding guards to `CopyUIDData` and `UIDPlusData`, and for getting the size of `SequenceSet#each_ordered_number` (another PR).
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Adds three new SequenceSet methods for querying about "duplicates":
#has_duplicates?: Returns whether the ordered entries contain any duplicates.#count_duplicates: Returns the count of duplicates in the ordered entries.#count_with_duplicates: Returns the count of numbers in the ordered entries, including any repeated numbers.