Jeff King [off-list ref] writes:

.... It affects all of raw, name-only,
name-status, and checkdiff. I know Junio said that --raw should not be
affected, but I'm not sure I agree.

I no longer am sure if I agree.  I do not mind a raw entry that
would show different object name for preimage and postimage for a
path to be omitted when --ignore-whatever is passed and the blobs
compare "equal" under the specified "ignore" criteria.

The behaviour sounds somewhat incoherent, but that is what the user,
who passes both --raw and --ignore-whatever to the command at the
same time, wants.