Address analysis issues (#2499)

Author: derekxu16

dwds/lib/src/debugging/metadata/provider.dart

@@ -192,7 +192,9 @@ class MetadataProvider {
           for (var contents in merged.split('\n')) {
             try {
               if (contents.isEmpty ||
-                  contents.startsWith('// intentionally empty:')) continue;
+                  contents.startsWith('// intentionally empty:')) {
+                continue;
+              }
               final moduleJson = json.decode(contents);
               final metadata =
                   ModuleMetadata.fromJson(moduleJson as Map<String, dynamic>);

dwds/test/fixtures/context.dart

@@ -362,10 +362,6 @@ class TestContext {
             buildResults = const Stream<BuildResults>.empty();
           }
           break;
-        default:
-          throw Exception(
-            'Unsupported compilation mode: ${testSettings.compilationMode}',
-          );
       }
 
       final debugPort = await findUnusedPort();

webdev/lib/src/daemon/utilites.dart

@@ -8,7 +8,9 @@ dynamic toJsonable(dynamic obj) {
       obj is bool ||
       obj is Map<dynamic, dynamic> ||
       obj is List<dynamic> ||
-      obj == null) return obj;
+      obj == null) {
+    return obj;
+  }
   return '$obj';
 }