message: (clippy) More idomatic reference matching.
diff: @@ -404,16 +404,16 @@ pub enum PrimeFieldDecodingError {
  impl Error for PrimeFieldDecodingError {
  fn description(&self) -> &str {
  - match self {
  - &PrimeFieldDecodingError::NotInField(..) => "not an element of the field"
  + match *self {
  + PrimeFieldDecodingError::NotInField(..) => "not an element of the field"
  }
  }
  }
  impl fmt::Display for PrimeFieldDecodingError {
  fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
  - match self {
  - &PrimeFieldDecodingError::NotInField(ref repr) => {
  + match *self {
  + PrimeFieldDecodingError::NotInField(ref repr) => {
  write!(f, "{} is not an element of the field", repr)
  }
  }
  @@ -437,20 +437,20 @@ pub enum GroupDecodingError {
  impl Error for GroupDecodingError {
  fn description(&self) -> &str {
  - match self {
  - &GroupDecodingError::NotOnCurve => "coordinate(s) do not lie on the curve",
  - &GroupDecodingError::NotInSubgroup => "the element is not part of an r-order subgroup",
  - &GroupDecodingError::CoordinateDecodingError(..) => "coordinate(s) could not be decoded",
  - &GroupDecodingError::UnexpectedCompressionMode => "encoding has unexpected compression mode",
  - &GroupDecodingError::UnexpectedInformation => "encoding has unexpected information"
  + match *self {
  + GroupDecodingError::NotOnCurve => "coordinate(s) do not lie on the curve",
  + GroupDecodingError::NotInSubgroup => "the element is not part of an r-order subgroup",
  + GroupDecodingError::CoordinateDecodingError(..) => "coordinate(s) could not be decoded",
  + GroupDecodingError::UnexpectedCompressionMode => "encoding has unexpected compression mode",
  + GroupDecodingError::UnexpectedInformation => "encoding has unexpected information"
  }
  }
  }
  impl fmt::Display for GroupDecodingError {
  fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
  - match self {
  - &GroupDecodingError::CoordinateDecodingError(description, ref err) => {
  + match *self {
  + GroupDecodingError::CoordinateDecodingError(description, ref err) => {
  write!(f, "{} decoding error: {}", description, err)
  },
  _ => {
  