Address comments

pkgs/intl4x/lib/src/list_format/list_format.dart

diff --git a/pkgs/intl4x/lib/src/list_format/list_format.dart b/pkgs/intl4x/lib/src/list_format/list_format.dart
index 8a5db0b..eed03f0 100644
--- a/pkgs/intl4x/lib/src/list_format/list_format.dart
+++ b/pkgs/intl4x/lib/src/list_format/list_format.dart
@@ -40,7 +40,9 @@
   /// import 'package:intl4x/list_format.dart';
   ///
   /// void main() {
-  ///   print(ListFormat().format(['Dog', 'Cat'])); // Prints 'Dog and Cat'
+  ///  print(
+  ///   ListFormat(locale: Locale.parse('en-US')).format(['Dog', 'Cat']),
+  ///  ); // Prints 'Dog and Cat'
   /// }
   /// ```
   String format(List<String> list) {

pkgs/intl4x/lib/src/number_format/number_format.dart

diff --git a/pkgs/intl4x/lib/src/number_format/number_format.dart b/pkgs/intl4x/lib/src/number_format/number_format.dart
index e54f7c9..20c9b1d 100644
--- a/pkgs/intl4x/lib/src/number_format/number_format.dart
+++ b/pkgs/intl4x/lib/src/number_format/number_format.dart
@@ -20,7 +20,9 @@
 /// import 'package:intl4x/number_format.dart';
 ///
 /// void main() {
-///   print(NumberFormat().format(123456.789)); // Prints '123,456.789'
+///   print(
+///     NumberFormat(locale: Locale.parse('en-US')).format(123456.789),
+///   ); // Prints '123,456.789'
 /// }
 /// ```
 final class NumberFormat {