cube grouping

PG Doc comments form <[email protected]>
Newsgroups gmane.comp.db.postgresql.devel.documentation
Message-ID <[email protected]>
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/11/queries-table-expressions.html
Description:

in the above example it seems as though the result 
CUBE(a,(b,c),d)
GROUPING SETS (
    ( a, b, c, d ),
    ( a, b, c    ),
    ( a          ),
    (            )
)

should include   (    b, c, d )
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