Format all tests.

tests/standalone/io/process_exit_negative_test.dart

Index: tests/standalone/io/process_exit_negative_test.dart
diff --git a/tests/standalone/io/process_exit_negative_test.dart b/tests/standalone/io/process_exit_negative_test.dart
index 418977f19b7e049bd3c8aec461210b2254df497b..645f7e66a18fa95a0966beb43ae6f5bfb1f6aac2 100644
--- a/tests/standalone/io/process_exit_negative_test.dart
+++ b/tests/standalone/io/process_exit_negative_test.dart
@@ -9,11 +9,10 @@ import "dart:io";
 import "process_test_util.dart";
 
 void main() {
-  var fp = Process.start(getProcessTestFileName(),
-                         const ["0", "0", "0", "0"]);
+  var fp = Process.start(getProcessTestFileName(), const ["0", "0", "0", "0"]);
   fp.then((p) {
     p.exitCode.then((int s) {
-      print(a.toString());  // Should cause a compilation error here.
+      print(a.toString()); // Should cause a compilation error here.
     });
     // Drain stdout and stderr.
     p.stdout.listen((_) {});