Document allowTrailingOptions in code
diff --git a/lib/src/arg_parser.dart b/lib/src/arg_parser.dart
index 0b81fed..f5ce41a 100644
--- a/lib/src/arg_parser.dart
+++ b/lib/src/arg_parser.dart
@@ -35,12 +35,12 @@
/// after it finds an argument that is neither an option nor a command.
/// This allows options to be specified after regular arguments. Defaults to
/// `false`.
- factory ArgParser({bool allowTrailingOptions}) => new ArgParser._(
+ factory ArgParser({bool allowTrailingOptions: false}) => new ArgParser._(
<String, Option>{}, <String, ArgParser>{},
allowTrailingOptions: allowTrailingOptions);
ArgParser._(Map<String, Option> options, Map<String, ArgParser> commands,
- {bool allowTrailingOptions})
+ {bool allowTrailingOptions: false})
: this._options = options,
this.options = new UnmodifiableMapView(options),
this._commands = commands,