format code, removed unused variables and deprecated usage

lib/src/arg_results.dart

Index: lib/src/arg_results.dart
diff --git a/lib/src/arg_results.dart b/lib/src/arg_results.dart
index 815d8dd76f50035f5ea8bfa890cd92f9df94b6e4..de9cca7010f65f4bedfebf6da9180016beb7f1b9 100644
--- a/lib/src/arg_results.dart
+++ b/lib/src/arg_results.dart
@@ -13,8 +13,8 @@ import 'arg_parser.dart';
 /// Since [ArgResults] doesn't have a public constructor, this lets [Parser]
 /// get to it. This function isn't exported to the public API of the package.
 ArgResults newArgResults(ArgParser parser, Map<String, dynamic> parsed,
-      String name, ArgResults command, List<String> rest,
-      List<String> arguments) {
+    String name, ArgResults command, List<String> rest,
+    List<String> arguments) {
   return new ArgResults._(parser, parsed, name, command, rest, arguments);
 }