Cleanup.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15429 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Cleanup.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15433 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Cleanup detection of duplicated type/... names.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15439 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Factorize.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15441 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02