Fix out of date doc comment in Intl.message
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=185417340
diff --git a/lib/intl.dart b/lib/intl.dart
index 222aa93..6f4e01b 100644
--- a/lib/intl.dart
+++ b/lib/intl.dart
@@ -161,10 +161,12 @@
/// section of the main
/// [package documentation] (https://pub.dartlang.org/packages/intl).
///
- /// The [name] and [args] arguments are required, and are used at runtime
- /// to look up the localized version and pass the appropriate arguments to it.
- /// We may in the future modify the code during compilation to make manually
- /// passing those arguments unnecessary.
+ /// For messages without parameters, both [name] and [args] can be omitted.
+ /// Messages that supply [args] should also supply a unique [name]. The [name]
+ /// and [args] arguments used at runtime to look up the localized version and
+ /// pass the appropriate arguments to it. We may in the future modify the code
+ /// during compilation to make manually passing those arguments unnecessary in
+ /// more situations.
///
/// The [skip] arg will still validate the message, but will be filtered from
/// the extracted message output. This can be useful to set up placeholder
