Fixed Issue #419: typo in the test corrected.
diff --git a/LanguageFeatures/Extension-methods/static_member_t02.dart b/LanguageFeatures/Extension-methods/static_member_t02.dart
index 53ef3c4..5a69f18 100644
--- a/LanguageFeatures/Extension-methods/static_member_t02.dart
+++ b/LanguageFeatures/Extension-methods/static_member_t02.dart
@@ -20,7 +20,7 @@
 }
 
 main() {
-  constant String str = "12345";
+  const String str = "12345";
   Expect.equals(str, MySmart.smart());
   Expect.equals(str, str.smartHelper(str));
   Expect.equals(str, str.smartHelper(str));