👌 Review improvements (isoos#6)

Author: Gustl22

lib/src/auth/auth.dart

@@ -1,12 +1,10 @@
-/// Source:  https://github.com/mongo-dart/mongo_dart/blob/c761839efbf47ec556f853dec85debb4cb9370f7/lib/src/auth/auth.dart
-
 import 'package:crypto/crypto.dart';
-import 'package:postgres/src/auth/sasl_authenticator.dart';
 import 'package:sasl_scram/sasl_scram.dart';
 
 import '../../postgres.dart';
 import '../server_messages.dart';
 import 'md5_authenticator.dart';
+import 'sasl_authenticator.dart';
 
 enum AuthenticationScheme { MD5, SCRAM_SHA_256 }
 

lib/src/auth/md5_authenticator.dart

@@ -10,7 +10,6 @@ import 'auth.dart';
 
 class MD5Authenticator extends PostgresAuthenticator {
   static final String name = 'MD5';
-  late List<int> _salt;
 
   final UsernamePasswordCredential credentials;
 
@@ -19,9 +18,9 @@ class MD5Authenticator extends PostgresAuthenticator {
   @override
   void onMessage(AuthenticationMessage message) {
     final reader = ByteDataReader()..add(message.bytes);
-    _salt = reader.read(4, copy: true);
+    final salt = reader.read(4, copy: true);
 
-    final authMessage = AuthMD5Message(connection.username!, connection.password!, _salt);
+    final authMessage = AuthMD5Message(connection.username!, connection.password!, salt);
 
     connection.socket!.add(authMessage.asBytes());
   }

lib/src/auth/sasl_authenticator.dart

@@ -1,4 +1,3 @@
-/// Source:  https://github.com/mongo-dart/mongo_dart/blob/c761839efbf47ec556f853dec85debb4cb9370f7/lib/src/auth/sasl_authenticator.dart
 import 'dart:typed_data';
 
 import 'package:buffer/buffer.dart';

lib/src/connection_fsm.dart

@@ -69,7 +69,7 @@ class _PostgreSQLConnectionStateSocketConnected
   _PostgreSQLConnectionState onMessage(ServerMessage message) {
 
     completer.completeError(PostgreSQLException(
-        'Unsupported message ${message.toString()}, closing connection.'));
+        'Unsupported message "${message.toString()}", closing connection.'));
 
     return _PostgreSQLConnectionStateClosed();
   }