Re: psql: Add role's membership options to the \du+ command

I noticed the document psql-ref.sgml has been updated for both `du+` and
`dg+`, but only `du` and `\du+` are covered in regression test. Is that
because `dg+` is treated exactly the same as `du+` from testing point of
view?

The reason I am asking this question is that I notice that `pg_monitor`
also has the detailed information, so not sure if more test cases required.