Format all tests.

tests/corelib/stacktrace_current_test.dart

Index: tests/corelib/stacktrace_current_test.dart
diff --git a/tests/corelib/stacktrace_current_test.dart b/tests/corelib/stacktrace_current_test.dart
index f68ba322959f1e40b9db2b3ba3cb785d1bcb69ab..6712e64ed8634b8885871dfe2856379f78ebbf7b 100644
--- a/tests/corelib/stacktrace_current_test.dart
+++ b/tests/corelib/stacktrace_current_test.dart
@@ -10,7 +10,11 @@ void main() {
   var st0;
   var st1;
   // Primitive way to get stack trace,.
-  try { throw 0; } catch (_, s) { st0 = s; }
+  try {
+    throw 0;
+  } catch (_, s) {
+    st0 = s;
+  }
   st1 = StackTrace.current;
 
   var st0s = findMain(st0);