minor fixes in doc

src/data/CCDeque.mli

@@ -79,8 +79,8 @@ type 'a sequence = ('a -> unit) -> unit
 
 val of_seq : 'a sequence -> 'a t
 (** Create a deque from the sequence.
-    @since 0.13 optional argument [deque] disappears, use
-      {!add_seq_back} instead. *)
+    optional argument [deque] disappears, use {!add_seq_back} instead since
+    0.13 *)
 
 val to_seq : 'a t -> 'a sequence
 (** Iterate on the elements. *)

src/data/CCMixmap.mli

@@ -26,9 +26,10 @@
           assert (M.get ~inj:inj_str 3 m = None)
     ]}
 
+    change of API, the map is last argument to make piping with [|>] easier since 0.16.
+
     @since 0.9
-    @since 0.16 change of API, the map is last argument to
-      make piping with [|>] easier. *)
+*)
 
 type 'a injection
 (** An accessor for values of type 'a in any map. Values put

src/data/CCRingBuffer.mli

@@ -10,10 +10,9 @@
 
     {b status: experimental}
 
-    @since 0.9
+    Change in the API to provide only a bounded buffer since 1.3
 
-    Change in the API to provide only a bounded buffer
-    @since 1.3
+    @since 0.9
 *)
 
 (** {2 Underlying Array} *)