format code, removed unused variables and deprecated usage

test/trailing_options_test.dart

Index: test/trailing_options_test.dart
diff --git a/test/trailing_options_test.dart b/test/trailing_options_test.dart
index 2ee860ca2f56b589d579a388139c8c236db55d38..24f6ce73336fe66d346bba417a4ac6c28179cff9 100644
--- a/test/trailing_options_test.dart
+++ b/test/trailing_options_test.dart
@@ -19,9 +19,9 @@ void main() {
       parser = new ArgParser(allowTrailingOptions: true);
     });
 
-    void expectThrows(List<String> args) =>
-      expect(() => parser.parse(args), throwsFormatException,
-          reason: "with allowTrailingOptions: true");
+    void expectThrows(List<String> args) => expect(
+        () => parser.parse(args), throwsFormatException,
+        reason: "with allowTrailingOptions: true");
 
     test('collects non-options in rest', () {
       parser.addFlag('flag');
@@ -84,8 +84,8 @@ void main() {
   test("uses the innermost command's trailing options behavior", () {
     var parser = new ArgParser(allowTrailingOptions: true);
     parser.addFlag('flag', abbr: 'f');
-    var command = parser.addCommand('cmd',
-        new ArgParser(allowTrailingOptions: false));
+    var command =
+        parser.addCommand('cmd', new ArgParser(allowTrailingOptions: false));
     command.addFlag('verbose', abbr: 'v');
 
     var results = parser.parse(['a', '-f', 'b']);