add spaces

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@13806 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
insert the next version number

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@13807 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
PR#5974: better documentation for Str.regexp

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@13808 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02