1 files changed, 6 insertions, 6 deletions
diff --git a/lib/LayerData.hs b/lib/LayerData.hs
index 1a07982..6956c92 100644
--- a/lib/LayerData.hs
+++ b/lib/LayerData.hs
@@ -2,12 +2,12 @@
 
 module LayerData where
 
+import           Universum         hiding (maximum, uncons)
 
 import           Control.Monad.Zip (mzipWith)
-import           Data.Set          (Set, insert)
-import           Data.Text         (Text)
-import qualified Data.Text         as T
-import           Data.Vector       (Vector, uncons)
+import           Data.Set          (insert)
+import           Data.Vector       (maximum, uncons)
+import qualified Text.Show         as TS
 import           Tiled             (GlobalId (unGlobalId), Layer (..))
 import           Util              (PrettyPrint (..))
 
@@ -22,8 +22,8 @@ instance Eq Collision where
 instance PrettyPrint Collision where
   prettyprint (Collision (a,b)) = a <> " and " <> b
 
-instance Show Collision where
-  show c = T.unpack $ prettyprint c
+instance TS.Show Collision where
+  show c = toString $ prettyprint c
 
 -- | Finds pairwise tile collisions between the given layers.
 layerOverlaps :: Vector Layer -> Set Collision