[core] [api] Support OCaml 4.08

The changes are large due to `Pervasives` deprecation:

- the `Pervasives` module has been deprecated in favor of `Stdlib`, we
  have opted for introducing a few wrapping functions in `Util` and
  just unqualified the rest of occurrences. We avoid the shims as in
  the previous attempt.

- a bug regarding partial application have been fixed.

- some formatting functions have been deprecated, but previous
  versions don't include a replacement, thus the warning has been
  disabled.

We may want to clean up things a bit more, in particular
w.r.t. modules once we can move to OCaml 4.07 as the minimum required
version.

Note that there is a clash between 4.08.0 modules `Option` and `Int`
and Coq's ones. It is not clear if we should resolve that clash or
not, see PR #10469 for more discussion.

On the good side, OCaml 4.08.0 does provide a few interesting
functionalities, including nice new warnings useful for devs.

1 files changed, 2 insertions, 2 deletions

diff --git a/engine/proofview.ml b/engine/proofview.ml
index c4a624e462..8b5bd4cd80 100644
--- a/engine/proofview.ml
+++ b/engine/proofview.ml
@@ -542,7 +542,7 @@ let tclDISPATCHGEN join tacs =
   let tacs = CList.map branch tacs in
   InfoL.tag (Info.Dispatch) (tclDISPATCHGEN0 join tacs)
 
-let tclDISPATCH tacs = tclDISPATCHGEN Pervasives.ignore tacs
+let tclDISPATCH tacs = tclDISPATCHGEN ignore tacs
 
 let tclDISPATCHL tacs = tclDISPATCHGEN CList.rev tacs
 
@@ -910,7 +910,7 @@ let tclPROGRESS t =
 exception Timeout
 let _ = CErrors.register_handler begin function
   | Timeout -> CErrors.user_err ~hdr:"Proofview.tclTIMEOUT" (Pp.str"Tactic timeout!")
-  | _ -> Pervasives.raise CErrors.Unhandled
+  | _ -> raise CErrors.Unhandled
 end
 
 let tclTIMEOUT n t =