Clarify ScanExtended
Make it more clear that ScanExtended increases the array size by 1, what ranges the exclusive and inclusive scan cover, and the features of the first and last entries.
Per suggestions in !2580 (merged).
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Make it more clear that ScanExtended increases the array size by 1, what ranges the exclusive and inclusive scan cover, and the features of the first and last entries.
Per suggestions in !2580 (merged).