anchor.diff:          .escapeAndValidateString(Intl.canonicalizedLocale(basicLocale));
       output.write(prologue(locale));
       // Exclude messages with no translation and translations with no matching
  -    // original message (e.g. if we're using some messages from a larger catalog)
  +    // original message (e.g. if we're using some messages from a larger
  +    // catalog)
       var usableTranslations = translations
           .where((each) => each.originalMessages != null && each.message != null)
           .toList();
  
positive.code:   Message get message => translated;
  
    toString() => id.toString();
  }
  
  /// We can't use a hyphen in a Dart library name, so convert the locale
  
negative.code:     for (var translation in usableTranslations) {
        // Some messages we generate as methods in this class. Simpler ones
        // we inline in the map from names to messages.
        var messagesThatNeedMethods = translation.originalMessages
            .where((each) => _hasArguments(each))
            .toSet()
            .toList();
        for (var original in messagesThatNeedMethods) {
          output
            ..write("  ")
  