Appends an aligned region listing — shared by the standalone regions report and the sheet
report's per-feature sections, so the two can never list regions differently.
Aligned listing rather than a pipe table (grep's rationale): rows are addresses, and the
follow-up call — a values/stats read of one region — consumes the address directly.
Appends an aligned region listing — shared by the standalone regions report and the sheet report's per-feature sections, so the two can never list regions differently.