Correct two typos.

pkg/mdns/lib/src/packet.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library mdns.src.packet;
 
 import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
 
@@ skipping 51 matching lines @@
 class FQDNReadResult {
   final List<String> fqdn;
   final int bytesRead;
   FQDNReadResult(this.fqdn, this.bytesRead);
 }
 
 /// Decode a mDNS package.
 ///
 /// If decoding fails (e.g. due to an invalid packet) `null` is returned.
 ///
-/// See See https://tools.ietf.org/html/rfc1035 for the format.
+/// See https://tools.ietf.org/html/rfc1035 for the format.
 List<DecodeResult> decodeMDnsResponse(List<int> packet) {
   int length = packet.length;
   if (length < headerSize) return null;
 
   Uint8List data =
       packet is Uint8List ? packet : new Uint8List.fromList(packet);
   ByteData bd = new ByteData.view(data.buffer);
   // Query identifier.
   int id = bd.getUint16(idOffset);
   // Flags.
@@ skipping 10 matching lines @@
   int arcount = bd.getUint16(arcountOffset);
   int offset = headerSize;
 
   void checkLength(int required) {
     if (length < required) throw new MDnsDecodeException(required);
   }
 
   // Read a FQDN at the given offset. Returns a pair with the FQDN
   // parts and the number of bytes consumed.
   //
-  // If decoding fails (e.g. die to an invalid packet) `null` is returned.
+  // If decoding fails (e.g. due to an invalid packet) `null` is returned.
   FQDNReadResult readFQDN(int offset) {
     List<String> parts = [];
     int prevOffset = offset;
     while (true) {
       // At least two bytes required.
       checkLength(offset + 2);
 
       // Check for compressed.
       if (data[offset] & 0xc0 == 0xc0) {
         // A compressed FQDN has a new offset in the lower 14 bits.
@@ skipping 64 matching lines @@
   return result;
 }
 
 /// Exceptions thrown by decoder when the packet is invalid.
 class MDnsDecodeException implements Exception {
   /// Exception message.
   final int offset;
   const MDnsDecodeException(this.offset);
   String toString() => 'Decoding error at $offset';
 }