Remove stray "the".

Per off-list report.

Author: robertmhaas

doc/src/sgml/user-manag.sgml

@@ -360,7 +360,7 @@ REVOKE <replaceable>group_role</replaceable> FROM <replaceable>role1</replaceabl
    database session has access to the privileges of the group role rather
    than the original login role, and any database objects created are
    considered owned by the group role not the login role.  Second, member
-   roles that have the been granted membership with the
+   roles that have been granted membership with the
    <literal>INHERIT</literal> option automatically have use
    of the privileges of those roles, including any
    privileges inherited by those roles.