write!(f, "rudp: ")?;
match self {
- IoError(err) => write!(f, "IO error: {}", err),
+ IoError(err) => write!(f, "IO error: {err}"),
InvalidProtoId(id) => write!(f, "invalid protocol ID: {id}"),
InvalidChannel(ch) => write!(f, "invalid channel: {ch}"),
InvalidType(tp) => write!(f, "invalid type: {tp}"),