Andreas W

To support local filesystem repositories the local protocol with file:// prefix can be used and is an easy marker. This is also what subversion uses.

See [`Iterator::intersperse`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.intersperse)

See [`Iterator::peekable`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.peekable)

See how iterators are doing it