[0.5.0] FORMAT error on first call to DATE

[Victor Zandy <zandy@cs.wisc.edu>]

sal-dnt% uname -a
Linux sal-dnt 2.0.6 #1 Fri Jul 12 15:31:31 CDT 1996 i686
sal-dnt% ~/bin/scsh
Scsh 0.5
> (date)

Error: insufficient number of arguments to FORMAT
1> 
> (date)
'#{%date}
> (date)
'#{%date}
> 
Exit the Scheme Shell (y/n)? y