RawVec::into_box: avoid unnecessary intermediate reference Fixes the problem described [here](https://github.com/rust-lang/miri/issues/3341#issuecomment-1987207195).
RawVec::into_box: avoid unnecessary intermediate reference Fixes the problem described [here](https://github.com/rust-lang/miri/issues/3341#issuecomment-1987207195).