rust-utils: add Rust implementation of Python's "os.path.splitdrive"...
rust-utils: add Rust implementation of Python's "os.path.splitdrive"
I also wrote the NT version although I didn't mean to at first, so I thought
I would keep it, so that any further effort to get the Rust code working on
Windows is a little easier.
Differential Revision:
https://phab.mercurial-scm.org/D7864
