Format all tests.

tests/language/throw3_test.dart

Index: tests/language/throw3_test.dart
diff --git a/tests/language/throw3_test.dart b/tests/language/throw3_test.dart
index 9a3ef0ad5d130505a97ebe8eb41f7a926b22c838..1d72345a0f4894ba678b0ba8a4dd30710b2dffb5 100644
--- a/tests/language/throw3_test.dart
+++ b/tests/language/throw3_test.dart
@@ -37,7 +37,7 @@ class Helper {
       }
     } on MyException catch (ex) {
       print(ex.message_);
-      rethrow;  // Rethrow the exception.
+      rethrow; // Rethrow the exception.
     }
     return 10;
   }