message: updated clippy for client.rs
diff: @@ -51,12 +51,13 @@ impl<'a, T: Authenticator + 'a, X: CDRSTransport + 'a> CDRS<T, X> {
  try!(self.transport.write(options_frame.as_slice()));
  - return parse_frame(&mut self.transport, &self.compressor).map(|frame| {
  + parse_frame(&mut self.transport, &self.compressor)
  + .map(|frame| {
  match frame.get_body() {
  ResponseBody::Supported(ref supported_body) => supported_body.data.clone(),
  _ => unreachable!(),
  }
  - });
  + })
  }
  /// The method establishes connection to the server which address was provided on previous
  @@ -127,9 +128,9 @@ impl<'a, T: Authenticator + 'a, X: CDRSTransport + 'a> CDRS<T, X> {
  }
  fn drop_connection(&mut self) -> error::Result<()> {
  - return self.transport
  + self.transport
  .close(net::Shutdown::Both)
  - .map_err(|err| error::Error::Io(err));
  + .map_err(|err| error::Error::Io(err))
  }
  }
  @@ -144,17 +145,17 @@ impl<T: Authenticator, X: CDRSTransport> Session<T, X> {
  /// Creates new session basing on CDRS instance.
  pub fn start(cdrs: CDRS<T, X>) -> Session<T, X> {
  let compressor = cdrs.compressor.clone();
  - return Session {
  + Session {
  cdrs: cdrs,
  started: true,
  compressor: compressor,
  - };
  + }
  }
  /// The method overrides a compression method of current session
  pub fn compressor(&mut self, compressor: Compression) -> &mut Self {
  self.compressor = compressor;
  - return self;
  + self
  }
  /// Manually ends current session.
  @@ -212,7 +213,7 @@ impl<T: Authenticator, X: CDRSTransport> Session<T, X> {
  let options_frame = Frame::new_req_execute(id, query_parameters, flags).into_cbytes();
  (self.cdrs.transport.write(options_frame.as_slice()))?;
  - return parse_frame(&mut self.cdrs.transport, &self.compressor);
  + parse_frame(&mut self.cdrs.transport, &self.compressor)
  }
  /// The method makes a request to DB Server to execute a query provided in `query` argument.
  @@ -249,7 +250,7 @@ impl<T: Authenticator, X: CDRSTransport> Session<T, X> {
  .into_cbytes();
  try!(self.cdrs.transport.write(query_frame.as_slice()));
  - return parse_frame(&mut self.cdrs.transport, &self.compressor);
  + parse_frame(&mut self.cdrs.transport, &self.compressor)
  }
  pub fn batch(&mut self,
  @@ -270,7 +271,7 @@ impl<T: Authenticator, X: CDRSTransport> Session<T, X> {
  let query_frame = Frame::new_req_batch(batch_query, flags).into_cbytes();
  try!(self.cdrs.transport.write(query_frame.as_slice()));
  - return parse_frame(&mut self.cdrs.transport, &self.compressor);
  + parse_frame(&mut self.cdrs.transport, &self.compressor)
  }
  /// It consumes CDRS
  