[ 2020-10-02; Issue processing telecon: Priority set to P3. ]

The algorithms partial_sum, exclusive_scan, inclusive_scan, transform_exclusive_scan, transform_inclusive_scan, and adjacent_difference with no ExecutionPolicy do not have a precondition "result is not in the range [first, last)". But they explicitly allow "result may be equal to first". This suggests the precondition got lost, because otherwise the permission is redundant.

Suggested fix: Add "result is not in the range [first + 1, last)." to the Preconditions paragraphs of the affected generalized numeric operations.