Get rid of the undocumented syntax #c[>`A] (#5936, #5983).

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/extension_points@13542 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Fix doc.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/extension_points@13543 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02