Top comments in modules and attributes

[jonludlam]

While changing the positioning of the deprecated attribute according to ocaml/ocaml#13054, the HTML output changed, removing the 'Top Comment' that was being output into Alert.html. There are some changes to the other HTML files too, but this was the one that looked suspicious.

Diffs look like:

--- a/test/generators/cases/alerts.mli
+++ b/test/generators/cases/alerts.mli
@@ -17,13 +17,11 @@ val c : int
 (* At the top-level of a module. *)

 module Top1 : sig
-  [@@@deprecated "A"]

   (** Top-comment. *)
-end
+end[@@deprecated "A"]

-module Top2 : sig
-  [@@@deprecated "A"]
+module[@deprecated "A"] Top2 : sig

   (** Top-comment. *)
 end

and

--- a/test/generators/html/Alerts.html
+++ b/test/generators/html/Alerts.html
@@ -57,7 +57,7 @@
        <span class="keyword">end</span>
       </span>
      </code>
-    </div><div class="spec-doc"><p>Top-comment.</p></div>
+    </div>
    </div>
    <div class="odoc-spec">
     <div class="spec module anchored" id="module-Top2">
@@ -70,7 +70,7 @@
        <span class="keyword">end</span>
       </span>
      </code>
-    </div><div class="spec-doc"><p>Top-comment.</p></div>
+    </div>
    </div>
    <div class="odoc-spec">
     <div class="spec value anchored" id="val-d">