Fixed Issue #448: typo corrected.
diff --git a/LanguageFeatures/Extension-methods/generic_parameter_inference_A01_t04.dart b/LanguageFeatures/Extension-methods/generic_parameter_inference_A01_t04.dart
index 0ffe2fa..bc01381 100644
--- a/LanguageFeatures/Extension-methods/generic_parameter_inference_A01_t04.dart
+++ b/LanguageFeatures/Extension-methods/generic_parameter_inference_A01_t04.dart
@@ -16,7 +16,7 @@
 // SharedOptions=--enable-experiment=extension-methods
 
 extension IncorrectExtension<T1, T2> on T1<T2> {
-  void testme() {};
+  void testme() {}
 }
 
 main() {