Don't copy SpecificField data in MessageDifferencer unnecessarily.

PiperOrigin-RevId: 694010705

csharp/src/Google.Protobuf/Reflection/FeatureSetDescriptor.g.cs

@@ -1,17 +0,0 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-//
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file or at
-// https://developers.google.com/open-source/licenses/bsd
-#endregion
-
-namespace Google.Protobuf.Reflection;
-
-internal sealed partial class FeatureSetDescriptor
-{
-    // Canonical serialized form of the edition defaults, generated by embed_edition_defaults.
-    private const string DefaultsBase64 =
-        "ChMYhAciACoMCAEQAhgCIAMoATACChMY5wciACoMCAIQARgBIAIoATABChMY6AciDAgBEAEYASACKAEwASoAIOYHKOgH";
-}

src/google/protobuf/util/message_differencer.cc

@@ -2111,7 +2111,7 @@ MessageDifferencer::StreamReporter::~StreamReporter() {
 void MessageDifferencer::StreamReporter::PrintPath(
     const std::vector<SpecificField>& field_path, bool left_side) {
   for (size_t i = 0; i < field_path.size(); ++i) {
-    SpecificField specific_field = field_path[i];
+    const SpecificField& specific_field = field_path[i];
 
     if (specific_field.field != nullptr &&
         specific_field.field->name() == "value") {