Update `--help` output
Update `--help` output

* No longer using `--severalunseparatewords` (but still accepts them for backwards compatibility)
* Use `<angled brackets>` for mandatory arguments (`[square brackets]` are for optional arguments)

FluxAugur/git-hooks,paulcadman/git-hooks,icefox/git-hooks,kbzod/git-hooks,FluxAugur/git-hooks