Doc: Manpages: Fix dependencies

Add missing on the odoc package.

'Unix.open_process_args_in' only works in the intended way on >=4.12.
Instead use 'Filename.quote_command', which requires 4.10.

Author: Julow

doc/dune

@@ -1,4 +1,6 @@
 (rule
+ (deps
+  (package odoc))
  (action
   (with-stdout-to
    manpage.gen.mld
@@ -7,8 +9,7 @@
 (rule
  (alias runtest)
  (enabled_if
-  (> %{ocaml_version} 4.08))
- (package odoc)
+  (> %{ocaml_version} 4.10))
  (action
   (diff manpage.mld manpage.gen.mld)))
 

doc/gen_manpage/dune

@@ -1,5 +1,5 @@
 (executable
  (name gen_manpage)
  (enabled_if
-  (> %{ocaml_version} 4.08))
+  (> %{ocaml_version} 4.10))
  (libraries astring unix))

doc/gen_manpage/gen_manpage.ml

@@ -4,7 +4,7 @@
 open Astring
 
 let with_process_in cmd args f =
-  let inp = Unix.open_process_args_in cmd (Array.of_list (cmd :: args)) in
+  let inp = Unix.open_process_in (Filename.quote_command cmd args) in
   let finally () = ignore (Unix.close_process_in inp) in
   Fun.protect ~finally (fun () -> f inp)