diff --git a/src/Diff.hs b/src/Diff.hs
index e480784..8409618 100644
--- a/src/Diff.hs
+++ b/src/Diff.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE TupleSections #-}
+
 module Diff
   ( diffToks
   ) where
@@ -49,8 +51,8 @@ stripEqToks t1 t2 = (pre, post, t1', t2')
         lastDiff (i + 1)
       | otherwise = i
     e = lastDiff 0
-    pre = map (\t -> (Keep, t)) . V.toList . V.take b $ t1
-    post = map (\t -> (Keep, t)) . V.toList . V.drop (l1 - e) $ t1
+    pre = map (Keep, ) . V.toList . V.take b $ t1
+    post = map (Keep, ) . V.toList . V.drop (l1 - e) $ t1
     t1' = V.slice b (l1 - e - b) t1
     t2' = V.slice b (l2 - e - b) t2
 
@@ -59,8 +61,8 @@ diffToks t1' t2' = pre ++ res ++ post
   where
     (pre, post, t1, t2) = stripEqToks t1' t2'
     res
-      | V.null t1 = map (\t -> (Add, t)) (V.toList t2)
-      | V.null t2 = map (\t -> (Remove, t)) (V.toList t1)
+      | V.null t1 = map (Add, ) (V.toList t2)
+      | V.null t2 = map (Remove, ) (V.toList t1)
       | V.length t1 >= V.length t2 =
         diffToks' $
         DiffEnv
diff --git a/src/Diff3.hs b/src/Diff3.hs
index 15edbee..1d58152 100644
--- a/src/Diff3.hs
+++ b/src/Diff3.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE TupleSections #-}
 module Diff3 where
 
 import Diff
@@ -28,8 +29,8 @@ diff3Toks tMine tOrig tYour =
     align ((Add, a):as) bs@((Remove, _):_) = (Mine, (Add, a)) : align as bs
     align as@((Remove, _):_) ((Add, b):bs) = (Your, (Add, b)) : align as bs
     align [] [] = []
-    align as@((Add, _):_) [] = map ((,) Mine) as
-    align [] bs@((Add, _):_) = map ((,) Your) bs
+    align as@((Add, _):_) [] = map (Mine,) as
+    align [] bs@((Add, _):_) = map (Your,) bs
     align _ _ = error "Internal failure: diffstreams seem broken, cannot align"
     conflict :: [(Origin, (Op, Tok))] -> Diff
     conflict [] = []
@@ -46,9 +47,9 @@ diff3Toks tMine tOrig tYour =
           [tokMine, tokYour] = map (map snd.filter ((/= Remove) . fst)) mys
        in if tokOrigsMine /= tokOrigsYour
             then error "Internal failure: merge origins differ"
-            else map ((,) MineChanged) tokMine ++
-                 map ((,) Original) tokOrigsMine ++
-                 map ((,) YourChanged) tokYour
+            else map (MineChanged,) tokMine ++
+                 map (Original,) tokOrigsMine ++
+                 map (YourChanged,) tokYour
     stable (Stable, _) = True
     stable _ = False
     unstable = not . stable
diff --git a/src/Format.hs b/src/Format.hs
index 71cb2a0..541befd 100644
--- a/src/Format.hs
+++ b/src/Format.hs
@@ -25,7 +25,7 @@ pprDiff1 :: (Op, Tok) -> BB.Builder
 pprDiff1 (op, (tok, s)) =
   fromString pfx <> escNewlines s <> lineSep
   where
-    pfx = opc:tc:[]
+    pfx = [opc,tc]
     opc = case op of
       Add -> '+'
       Keep -> ' '
diff --git a/src/Main.hs b/src/Main.hs
index 8d48b9e..c98c5c3 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -101,7 +101,7 @@ actionOption =
 adiffOptions = ADiffOptions <$> redfaOption <*> actionOption
 
 loadToks redfa f =
-  mmapFileByteString f Nothing >>= redfaTokenize redfa >>= pure . V.fromList
+  mmapFileByteString f Nothing >>= (V.fromList <$> redfaTokenize redfa)
 
 main :: IO ()
 main =