Useless "Replica Identity: NOTHING" noise from psql \d

In HEAD:

regression=# \d pg_depend
Table "pg_catalog.pg_depend"
Column | Type | Modifiers
-------------+---------+-----------
classid | oid | not null
objid | oid | not null
objsubid | integer | not null
refclassid | oid | not null
refobjid | oid | not null
refobjsubid | integer | not null
deptype | "char" | not null
Indexes:
"pg_depend_depender_index" btree (classid, objid, objsubid)
"pg_depend_reference_index" btree (refclassid, refobjid, refobjsubid)
Replica Identity: NOTHING

Where did that last line come from, and who thinks it's so important
that it should appear by default? It seems absolutely content-free
even if I were using whatever feature it refers to, since it is
(I presume) the default state.

Please either suppress this entirely or at least condition it on \d+.

regards, tom lane