Improvement to test script, distinguishes when input ends with whitespace

src/runtime/haskell-bind/test.hs

@@ -1,4 +1,6 @@
 import PGF2
+import qualified Data.Char as C
+import qualified Data.List as L
 import qualified Data.Map as M
 
 main :: IO ()
@@ -8,8 +10,13 @@ main = do
     Just concr = M.lookup "FoodsEng" (languages pgf)
     loop = do
       putStr "> "
-      tks <- words <$> getLine
-      let pr = complete concr (startCat pgf) (unwords (init tks)) (last tks) Nothing
+      input <- getLine
+      let
+        (sent,pfx) =
+          if C.isSpace (last input)
+          then (input, "")
+          else let toks = words input in (unwords (init toks), last toks)
+      let pr = complete concr (startCat pgf) sent pfx Nothing
       case pr of
         ParseOk x -> print x
         ParseFailed x s -> putStrLn $ "parse failed at " ++ show x ++ " " ++ s