f971264fd7
Specialize some `io::Read` and `io::Write` methods for `VecDeque<u8>` and `&[u8]` This improves implementation of: - `<&[u8]>::read_to_string` - `VecDeque<u8>::read_to_end` - `VecDeque<u8>::read_to_string` - `VecDeque<u8>::write_vectored`