Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2006-12-06 09:31:51 -0800 (Wed, 06 Dec 2006)
Revision: 9824
Log message:

      Changed array function slightly:
      
         concat_array [ValString s] -> ValData s
         concat_array [ValSequence x] -> ValQuote [ValSequence x]
         concat_array [v] -> v (* otherwise *)