Break the response file by line termination rather

than spaces, since spaces may be within the parameters.
This simple approach avoids having the need for any
quoting and/or escaping (although a newline char will
not be possible in a parameter and has no escape
mechanism to allow it).

driver/Main.hs

@@ -20,7 +20,7 @@ expandResponse :: [String] -> IO [String]
 expandResponse = fmap concat . mapM expand
   where
     expand :: String -> IO [String]
-    expand ('@':f) = readFileExc f >>= return . filter (not . null) . words
+    expand ('@':f) = readFileExc f >>= return . filter (not . null) . lines
     expand x = return [x]
 
     readFileExc f =