diff --git a/README.md b/README.md
index 3eaba1ab1228e94ddce8ccc547721012e6263565..e46f95a449d8e24f8f3248c2f82cea7f5882af76 100644
--- a/README.md
+++ b/README.md
@@ -131,3 +131,4 @@ TODO / bugs
   it is better than putting everything at the end.
 - `border:none` could be `border:0`, or in general any shorthand that has both
   a `style` and `width` property should be transformed from `none` into `0`.
+- Automated test suite: auto-diff css files and expected minified versions.
diff --git a/types.ml b/types.ml
index ed97d64d89cf0519aa9c1c0c7a9511055d762ea8..fd3869e24293906084716daad8fb1f91a1cffe06 100644
--- a/types.ml
+++ b/types.ml
@@ -27,8 +27,8 @@ and pseudo_class_arg =
   | Nth of nth
 and nth =
   | Even | Odd
-  (* a and b in an+b *)
   | Formula of int * int
+  (* a and b in an+b *)
 
 type media_expr = string * expr option
 type media_query = string option * string option * media_expr list