fixed linting errors

Author: jyameo

dwds/test/fixtures/context.dart

@@ -394,7 +394,8 @@ class TestContext {
                         buildSettings,
                       ).strategy,
               _ => throw Exception(
-                'Unsupported DDC module format ${testSettings.moduleFormat.name}.',
+                'Unsupported DDC module format '
+                '${testSettings.moduleFormat.name}.',
               ),
             };
             buildResults = const Stream<BuildResults>.empty();

dwds/test/frontend_server_callstack_test.dart

@@ -30,7 +30,7 @@ void main() {
     setUpAll(() async {
       setCurrentLogWriter(debug: debug);
       await context.setUp(
-        testSettings: TestSettings(
+        testSettings: const TestSettings(
           compilationMode: CompilationMode.frontendServer,
           enableExpressionEvaluation: true,
           verboseCompiler: debug,

dwds/test/handlers/asset_handler_test.dart

@@ -22,7 +22,7 @@ void main() {
     setUpAll(() async {
       setCurrentLogWriter();
       await context.setUp(
-        testSettings: TestSettings(
+        testSettings: const TestSettings(
           enableExpressionEvaluation: true,
           verboseCompiler: false,
         ),

dwds/test/handlers/injector_test.dart

@@ -311,7 +311,7 @@ void main() {
       late DwdsInjector injector;
       setUp(() async {
         final toolConfiguration = TestToolConfiguration.withDefaultLoadStrategy(
-          debugSettings: TestDebugSettings.noDevToolsLaunch().copyWith(
+          debugSettings: const TestDebugSettings.noDevToolsLaunch().copyWith(
             useSse: false,
           ),
         );

dwds/test/hot_reload_breakpoints_test.dart

@@ -47,7 +47,7 @@ void main() {
     setUp(() async {
       setCurrentLogWriter(debug: debug);
       await context.setUp(
-        testSettings: TestSettings(
+        testSettings: const TestSettings(
           enableExpressionEvaluation: true,
           compilationMode: CompilationMode.frontendServer,
           moduleFormat: ModuleFormat.ddc,
@@ -523,15 +523,15 @@ void main() {
       // the old string still as the closure has not been reevaluated.
       await callEvaluateAndWaitForLog(oldCapturedString);
     });
-  }, timeout: Timeout.factor(2));
+  }, timeout: const Timeout.factor(2));
 
   group('when pause_isolates_on_start is false', () {
     late VmService client;
 
     setUp(() async {
       setCurrentLogWriter(debug: debug);
       await context.setUp(
-        testSettings: TestSettings(
+        testSettings: const TestSettings(
           enableExpressionEvaluation: true,
           compilationMode: CompilationMode.frontendServer,
           moduleFormat: ModuleFormat.ddc,
@@ -590,7 +590,7 @@ void main() {
       // Program should not be paused, so this should execute.
       await callEvaluateAndWaitForLog(newString);
     });
-  }, timeout: Timeout.factor(2));
+  }, timeout: const Timeout.factor(2));
 }
 
 TypeMatcher<Event> _hasKind(String kind) =>