Fix typos. (#2035)

internal/msgdecoder/msgdecoder.go

@@ -172,7 +172,7 @@ func (m *MessageDecoder) parseHeader(b []byte) {
 		Overhead:     m.padding + 5,
 	}
 	m.padding = 0
-	// Dispatch the information retreived from message header so
+	// Dispatch the information retrieved from message header so
 	// that the RPC goroutine can send a proactive window update as we
 	// wait for the rest of it.
 	m.dispatch(hdr)

transport/stream.go

@@ -291,7 +291,7 @@ func (s *Stream) SetSendCompress(str string) {
 	s.sendCompress = str
 }
 
-// Done returns a chanel which is closed when it receives the final status
+// Done returns a channel which is closed when it receives the final status
 // from the server.
 func (s *Stream) Done() <-chan struct{} {
 	return s.done