code cleanup

Author: jdegoes

MODULE.md

@@ -111,6 +111,8 @@
 
 ### Values
 
+    _tail :: forall f a. Cofree f a -> Trampoline (f (Cofree f a))
+
     head :: forall f a. Cofree f a -> a
 
     mkCofree :: forall f a. a -> f (Cofree f a) -> Cofree f a

src/Control/Comonad/Cofree.purs

@@ -3,7 +3,8 @@ module Control.Comonad.Cofree
     Cofree(),
     mkCofree,
     head,
-    tail
+    tail,
+    _tail
   ) where
 
   import Control.Comonad