[wp] Fix sequence insertion order

src/plugins/wp/Conditions.ml

@@ -1740,7 +1740,7 @@ let step_at seq k =
 let in_sequence_add_list ~replace =
   let rec in_list k h w =
     if k = 0 then
-      List.rev_append h
+      List.rev_append (List.rev h)
         (if replace
          then match w with
            | [] -> assert false

src/plugins/wp/tests/wp_tip/oracle/split.res.oracle

@@ -247,11 +247,11 @@
   Goal Wp.Tactical.typed_test_step_and_ensures-0 (generated):
   Assume {
     (* Pre-condition *)
-    Have: P_R.
+    Have: P_P.
     (* Pre-condition *)
     Have: P_Q.
     (* Pre-condition *)
-    Have: P_P.
+    Have: P_R.
   }
   Prove: P_S.