9 Feb
                
                    2008
                
            
            
                9 Feb
                
                '08
                
            
            
            
        
    
                04:31
            
        Florian, Nice job! After applying the patch, it passes all tests for me. Perhaps I'll run the patched version for my students. I was considering tackling the pattern-matching myself, but I'm glad I didn't, because you've done it much more quickly than I could have. Instead maybe I'll study your solution and write some more tests. :) Dana