impl fmt::Debug for EasyBuf (cf. #120)
impl fmt::Debug for EasyBuf (cf. #120)

Debug format looks like this for small resp. long buffers

EasyBuf{len=2/6 [5, 6]}
EasyBuf{len=255/255 [0, 1, 2, 3, ..., 251, 252, 253, 254]}

tokio-rs/tokio,tokio-rs/tokio