Imports: Leading :: shouldn't be stripped.

[rickvanprim]

pub(crate) use ::fnv::FnvHasher;

pub mod fnv;
pub use self::fnv::*;

gets transformed into

pub(crate) use fnv::FnvHasher;

pub mod fnv;
pub use self::fnv::*;

In this case where there's a name overlap, this has a semantically different meaning. I don't think rustfmt should be stripping the leading ::.

[calebcartwright]

Believe this is a duplicate of #3501. Make sure you are specifying the edition value (either in rustfmt.toml or cli arg) if you are running rustfmt directly

[rickvanprim]

Good catch, thank you @calebcartwright that appears to fix it!