build

1 files changed, 1 insertions, 0 deletions

diff --git a/src/Lib.hs b/src/Lib.hs
index 629ed4f..6842144 100644
--- a/src/Lib.hs
+++ b/src/Lib.hs
@@ -822,6 +822,7 @@ headMay []    = Nothing
 headMay (x:_) = Just x
 
 data HeadException = HeadException deriving (Show)
+
 instance E.Exception HeadException
 
 mustHead :: [a] -> IO a