Run dartfmt on all files under runtime.

runtime/observatory/tests/service/positive_token_pos_test.dart

Index: runtime/observatory/tests/service/positive_token_pos_test.dart
diff --git a/runtime/observatory/tests/service/positive_token_pos_test.dart b/runtime/observatory/tests/service/positive_token_pos_test.dart
index c30da31d28dabe0a6bc81c64eaaf0189ea2d9dc5..556091644142bfb984dbebf00cfc9b2c71be6f5f 100644
--- a/runtime/observatory/tests/service/positive_token_pos_test.dart
+++ b/runtime/observatory/tests/service/positive_token_pos_test.dart
@@ -9,12 +9,13 @@ import 'package:unittest/unittest.dart';
 import 'service_test_common.dart';
 import 'test_helper.dart';
 
-helper() async {  // Line 12, Col 16 is the open brace.
+helper() async {
+  // Line 12, Col 16 is the open brace.
 }
 
 testMain() {
   debugger();
-  helper();  // Line 17, Col 3 is the position of the function call.
+  helper(); // Line 17, Col 3 is the position of the function call.
 }
 
 var tests = [
@@ -22,7 +23,6 @@ var tests = [
   markDartColonLibrariesDebuggable,
   stoppedAtLine(17),
   stepInto,
-
   (Isolate isolate) async {
     ServiceMap stack = await isolate.getStack();
     expect(stack['frames'].length, greaterThan(3));