Disabling iterators in shellcommands

[Alexander Mattausch]

Hello,

is there a way to disable iterators in a shellcommand? I have the
following code:

control:
 var = ( "a:b:c" )

shellcommands:
 "/some/program $(var)"

and $(var) should be passed unchanged to /some/program. I know that I
could change the character which separates the list, but this would
break all my intended iterators. Does the variable $(colon) as a 
replacement for ":" exist (I haven't found anything)?

Any ideas?

Thanks,
Alex