Allow ClassName_methodName for a message name, easier to disambiguate duplicates

test/message_extraction/part_of_sample_with_messages.dart

Index: test/message_extraction/part_of_sample_with_messages.dart
diff --git a/test/message_extraction/part_of_sample_with_messages.dart b/test/message_extraction/part_of_sample_with_messages.dart
index dc52d2183ee8907c26d59118a65ee602a137fe90..31cddccd12257bf3d27306be795638f0bcb40217 100644
--- a/test/message_extraction/part_of_sample_with_messages.dart
+++ b/test/message_extraction/part_of_sample_with_messages.dart
@@ -18,7 +18,7 @@ class YouveGotMessages {
 
   // An instance method, rather than a standalone function.
   method() => Intl.message("This comes from a method",
-      name: 'method', desc: 'This is a method with a '
+      name: 'YouveGotMessages_method', desc: 'This is a method with a '
       'long description which spans '
       'multiple lines.');