I think the implementation leakage is the fact that mv is used for renaming files. Windows has "move" and "ren", where the latter works the way the author would

I think the implementation leakage is the fact that mv is used for renaming files. Windows has "move" and "ren", where the latter works the way the author would like. > REN [drive:][path]filename1 filename2. > Note that you cannot specify a new drive or path for your destination file.