Function gix_path::join_bstr_unix_pathsep

pub fn join_bstr_unix_pathsep<'a, 'b>(
    base: impl Into<Cow<'a, BStr>>,
    path: impl Into<&'b BStr>
) -> Cow<'a, BStr>

Join path to base such that they are separated with a /, i.e. base/path.