Home > Format as Table on a cell or range inside an existing table
failed with "A table can't overlap another table." Excel applies the
picked style to that table instead. The command now returns that table
and its range, as it does for a new table. A range crossing a table's
edge is still rejected.
Without a range, the active area of the selection decides, as it does
for Insert > Table. The native Format menu's Format as Table now runs
home.formatAsTable instead of insert.table.