> has <item> <item list>
> If item is in item list, then has returns 0. Otherwise, 1 is returned. There is another version,
> hasv, that will conditionally echo item.
> The item list is delimited by the IFS variable. This variable has a default value of ' ', or a
> space. It is a bash(1) setting.
In fact it doesn't split arguments and PMS agrees with this behaviour.