Auto-remove blank lines in a list field

[Tariel Gogoberidze]

> >I have a list field and I am trying to write a script
> >that upon "closeField" (or something appropriate),
> >will automatically check each line in the field and
> >remove/delete any blank lines in the list field;
> >
> 
> on closeField
>   filter me with "?*"
> end closeField
> --
> 
> regards,
> 
> Geoff Canyon
> gcanyon at inspiredlogic.com


What's the advantages of using filter with "?*" as  opposed to just
filter with "*" to remove  empty lines?.
Filter with "*" always worked fine for me but I would  love  to know if
filter with "?*" gives some  additional advantages
Thanks
T.G.