The heading carries the contentful count; the lines are the census, largest first, and they
sum to it — see countKinds, which the workbook's content row reads too, so a sheet is
described in the same words and the same numbers at both altitudes. Features are not here: each
has a partition to list, and carries its cell count on its own section heading.
Zero kinds are elided, and blanks appear nowhere — empty is not a kind of content.
Appends the
Kindsection — what the contentful cells ARE, kind by kind.