In the multicol spec we define column-gap: https://drafts.csswg.org/css-multicol-1/#cg

The use of column-gap in multicol is also defined in Box Alignment: https://www.w3.org/TR/css-align-3/#column-row-gap

Should we deal with this in the way that gaps are dealt with in grid (https://www.w3.org/TR/css-grid-1/#gutters). Removing the table and then mentioning anything specific to this layout method?