Apply trailing-comma lint (#2054)

Author: elliette

dwds/analysis_options.yaml

@@ -16,8 +16,9 @@ analyzer:
 linter:
   rules:
     - always_use_package_imports
+    - avoid_void_async
     - directives_ordering
     - prefer_final_locals
+    - require_trailing_commas
     - unawaited_futures
-    - avoid_void_async
     - unnecessary_lambdas

dwds/debug_extension/tool/copy_builder.dart

@@ -30,8 +30,11 @@ class _CopyBuilder extends Builder {
     }
 
     final outputAsset = allowedOutputs.first;
-    await _copyBinaryFile(buildStep,
-        inputAsset: inputAsset, outputAsset: outputAsset);
+    await _copyBinaryFile(
+      buildStep,
+      inputAsset: inputAsset,
+      outputAsset: outputAsset,
+    );
   }
 
   Future<void> _copyBinaryFile(
@@ -40,6 +43,8 @@ class _CopyBuilder extends Builder {
     required AssetId outputAsset,
   }) {
     return buildStep.writeAsBytes(
-        outputAsset, buildStep.readAsBytes(inputAsset));
+      outputAsset,
+      buildStep.readAsBytes(inputAsset),
+    );
   }
 }

dwds/debug_extension/tool/update_dev_files.dart

@@ -78,7 +78,9 @@ Future<void> _updateDevtoolsJs() async {
 }
 
 Future<void> _transformDevFile(
-    File devFile, List<String> Function(String) transformLine) async {
+  File devFile,
+  List<String> Function(String) transformLine,
+) async {
   final lines = devFile.readAsLinesSync();
   final newLines = <String>[];
   for (final line in lines) {