error: call to `set_readonly` with argument `false`
   --> src/uu/shred/src/shred.rs:465:9
    |
465 |         perms.set_readonly(false);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: on Unix platforms this results in the file being world writable
    = help: you can set the desired permissions using `PermissionsExt`. For more information, see
            https://doc.rust-lang.org/std/os/unix/fs/trait.PermissionsExt.html
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#permissions_set_readonly_false
    = note: `-D clippy::permissions-set-readonly-false` implied by `-D warnings`