[flutter_tool] Fix some create_test.dart tests on Windows (#63796)

packages/flutter_tools/test/commands.shard/permeable/create_test.dart

@@ -1121,7 +1121,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: app\n'));
+    expect(LineSplitter.split(metadata), contains('project_type: app'));
   });
 
   testUsingContext('can re-gen default template over existing app project with no metadta and detect the type', () async {
@@ -1138,7 +1138,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: app\n'));
+    expect(LineSplitter.split(metadata), contains('project_type: app'));
   });
 
   testUsingContext('can re-gen app template over existing app project and detect the type', () async {
@@ -1152,7 +1152,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: app\n'));
+    expect(LineSplitter.split(metadata), contains('project_type: app'));
   });
 
   testUsingContext('can re-gen template over existing module project and detect the type', () async {
@@ -1166,7 +1166,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: module\n'));
+    expect(LineSplitter.split(metadata), contains('project_type: module'));
   });
 
   testUsingContext('can re-gen default template over existing plugin project and detect the type', () async {
@@ -1180,7 +1180,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: plugin'));
+    expect(LineSplitter.split(metadata), contains('project_type: plugin'));
   });
 
   testUsingContext('can re-gen default template over existing package project and detect the type', () async {
@@ -1194,7 +1194,7 @@ void main() {
     await runner.run(<String>['create', '--no-pub', projectDir.path]);
 
     final String metadata = globals.fs.file(globals.fs.path.join(projectDir.path, '.metadata')).readAsStringSync();
-    expect(metadata, contains('project_type: package'));
+    expect(LineSplitter.split(metadata), contains('project_type: package'));
   });
 
   testUsingContext('can re-gen module .android/ folder, reusing custom org', () async {