[pigeon] Minor C++ output adjustments (#3083)

* [pigeon] Minor C++ output fixes

Removes a stray ; from an inline constructor.

Fixes indentation for an inline vector construction.

* Version bump

* Change list serialization construction and remove a bunch of flutter::s

* Move some implementation-file-only helpers into the class

* Remove more namespaces

* Update test expectations

* Improve test

* declaration-style comment

* Fix generator version

Author: stuartmorgan-g

packages/pigeon/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 7.0.4
+
+* [c++] Fixes minor output formatting issues.
+
 ## 7.0.3
 
 * Updates scoped methods to prevent symbol-less use.

packages/pigeon/lib/cpp_generator.dart

@@ -11,7 +11,7 @@ import 'ast.dart';
 /// The current version of pigeon.
 ///
 /// This must match the version in pubspec.yaml.
-const String pigeonVersion = '7.0.3';
+const String pigeonVersion = '7.0.4';
 
 /// Read all the content from [stdin] to a String.
 String readStdin() {

packages/pigeon/lib/generator_tools.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 package com.example.alternate_language_test_plugin;

packages/pigeon/platform_tests/alternate_language_test_plugin/android/src/main/java/com/example/alternate_language_test_plugin/CoreTests.java

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import <Foundation/Foundation.h>

packages/pigeon/platform_tests/alternate_language_test_plugin/ios/Classes/CoreTests.gen.h

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import "CoreTests.gen.h"

packages/pigeon/platform_tests/alternate_language_test_plugin/ios/Classes/CoreTests.gen.m

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 // ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, prefer_null_aware_operators, omit_local_variable_types, unused_shown_name, unnecessary_import
 

packages/pigeon/platform_tests/shared_test_plugin_code/lib/src/generated/core_tests.gen.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // 
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 package com.example.test_plugin

packages/pigeon/platform_tests/test_plugin/android/src/main/kotlin/com/example/test_plugin/CoreTests.gen.kt

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // 
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 import Foundation

packages/pigeon/platform_tests/test_plugin/ios/Classes/CoreTests.gen.swift

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // 
-// Autogenerated from Pigeon (v7.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 import Foundation