HISTDUMP
todo |= HISTDUMP;
if (todo & (HISTLIST|HISTDUMP)) {
if ((todo & (HISTLIST|HISTDUMP)) ==
(HISTLIST|HISTDUMP))
if ((todo & (HISTLIST|HISTDUMP)) && !(done & (HISTLIST|HISTDUMP))) {
done |= HISTLIST|HISTDUMP;