add simple test module for ease PR review

Signed-off-by: lubegasimon <[email protected]>

test/integration/markdown.t/test.mli

@@ -0,0 +1,123 @@
+(** {1 This is a heading }*)
+
+(** {2:label This has a label}*)
+
+(** arrow (->) in a doc comment *)
+
+val concat : string -> string -> string
+
+(** {%html:foo:bar%} : a raw markup *)
+
+type t
+(** Doc for [type t]. *)
+
+type a = t
+
+type y'
+
+module type Foo' = sig
+  type foo
+end
+
+module Bar : sig
+  type bar
+end
+
+module type Bar' = sig
+  type bar'
+end
+
+module type Foo = sig
+  type foo
+
+  include Bar'
+
+  module type Foo' = sig
+    type foo'
+
+    type days = Mon  (** Docs for [days]. *)
+
+    type num = [ `One (** Docs for [`One]*)]
+  end
+end
+
+type other_names = { given : string; nickname : string }
+
+type name = {
+  fname : string;  (** Docs for [fname] *)
+  lname : string;
+  others : other_names;
+}
+
+(** {2:foo Label} *)
+
+(** {{:href} test_two } *)
+
+(** {{:href} {b test}} *)
+
+(** {{:href} test two foo } *)
+
+(** {{:href} **barz** } *)
+
+(** {v
+verbatim
+text
+v} *)
+
+(** See if listness is preserved. *)
+
+(** This is an {i interface} with {b all} of the {e module system} features.
+    This documentation demonstrates:
+- comment formatting
+- unassociated comments
+- documentation sections
+- module system documentation including
+ {ol
+ {- submodules}
+ {- module aliases}
+ {- module types}
+ {- module type aliases}
+ {- modules with signatures}
+ {- modules with aliased signatures}
+}
+
+A numbered list:
++ 3
++ 2
++ 1
+
+    David Sheets is the author.
+    @author David Sheets
+*)
+
+(** The end foo end keyword in doc comment. *)
+module Foo : sig
+  type foo
+
+  type poly = [ `Mon | `Tue ]
+
+  type name = { fname : string; lname : string }
+end
+
+(** p1 *)
+
+(** p2
+
+   p3
+
+   {ul
+     {- a}
+     {- b}
+    } *)
+
+(** This is where I begin my thing from. *)
+
+(** {ol
+      {- one}
+      {- two}
+    } *)
+
+(** {ul
+      {- Mon}
+      {- Tue}
+    } *)