cosmetic change.

CabalDev.hs

@@ -17,15 +17,13 @@ import Types
 modifyOptions :: Options -> IO Options
 modifyOptions opts = found ||> notFound
   where
-    found = do
-        path <- findCabalDev (sandbox opts)
-        return $ addPath opts path
+    found = addPath opts <$> findCabalDev (sandbox opts)
     notFound = return opts
 
 findCabalDev :: Maybe String -> IO FilePath
 findCabalDev (Just path) = do
-    a <- doesDirectoryExist path
-    if a then
+    exist <- doesDirectoryExist path
+    if exist then
         findConf path
       else
         findCabalDev Nothing