move the "-" option to a better place in the help output

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@14439 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
typos in the doc

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@14440 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
fix white space

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@14441 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02