diff --git a/src/Iter.ml b/src/Iter.ml
index 1cd1b07..40fd47d 100644
--- a/src/Iter.ml
+++ b/src/Iter.ml
@@ -33,9 +33,9 @@ let empty _ = ()
     (try iter (fun _ -> raise Exit) seq; true with Exit -> false);
 *)
 
-let singleton x k = k x
 let return x k = k x
-let pure f k = k f
+let singleton = return
+let pure = return
 
 let doubleton x y k = k x; k y
 
@@ -168,7 +168,7 @@ let concat s k = s (fun s' -> s' k)
     |> OUnit.assert_equal 2000
 *)
 
-let flatten s = concat s
+let flatten = concat
 
 let flat_map f seq k = seq (fun x -> f x k)
 
@@ -196,7 +196,8 @@ let seq_list l = seq_list_map (fun x->x) l
 *)
 
 let filter_map f seq k =
-  seq (fun x -> match f x with
+  seq
+    (fun x -> match f x with
       | None -> ()
       | Some y -> k y)
 
@@ -222,7 +223,9 @@ let filter_count f seq =
 
 let intersperse elem seq k =
   let first = ref true in
-  seq (fun x -> (if !first then first := false else k elem); k x)
+  seq (fun x ->
+      if !first then first := false else k elem;
+      k x)
 
 (*$R
   (1 -- 100)
diff --git a/src/Iter.mli b/src/Iter.mli
index 5d1d5f4..8f5bed7 100644
--- a/src/Iter.mli
+++ b/src/Iter.mli
@@ -134,9 +134,9 @@ val mapi : (int -> 'a -> 'b) -> 'a t -> 'b t
 (** Map objects, along with their index in the iterator *)
 
 val map_by_2 : ('a -> 'a -> 'a) -> 'a t -> 'a t
-  (** Map objects two by two. lazily.
-      The last element is kept in the iterator if the count is odd.
-      @since 0.7 *)
+(** Map objects two by two. lazily.
+    The last element is kept in the iterator if the count is odd.
+    @since 0.7 *)
 
 val for_all : ('a -> bool) -> 'a t -> bool
 (** Do all elements satisfy the predicate? *)