Hello. The page https://www.postgresql.org/docs/current/ddl-priv.html does not describe what =Tc/user means. Also I did not find a link to appropriate page which describes this. Specifically I do not understand how 'user=Tc/user' differs from '=Tc/user'.
It would be nice if documentation will be extended.
The paragraph immediately following table 5.2 describes all of this.