error message when subscription target is a partitioned table

Hi,

Could we improve the error message that's output when the subscription
target relation is a partitioned table?  Currently, we get:

ERROR:  logical replication target relation "public.foo" is not a table

I think it'd be more helpful to get:

ERROR: "public.foo" is a partitioned table
DETAIL: Partitioned tables are not supported as logical replication targets

Thoughts?

Thanks,
Amit