WHATIS_BUFCTL
'b', MDB_OPT_SETBITS, WHATIS_BUFCTL, &w.w_flags, /* hidden */
(!(mdb_whatis_flags(w) & WHATIS_BUFCTL) ||
do_bufctl = ((mdb_whatis_flags(w) & WHATIS_BUFCTL) != 0);
((mdb_whatis_flags(w) & WHATIS_BUFCTL) != 0 ||
do_bufctl = ((mdb_whatis_flags(w) & WHATIS_BUFCTL) != 0);