Format all tests.

tests/language/try_catch_optimized4_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 import "package:expect/expect.dart";
 
 // Test correct dead phi elimination with try catch.
 
-List<Object> a = [1,2,3,4,5];
+List<Object> a = [1, 2, 3, 4, 5];
 
-class MyError { }
+class MyError {}
 
 class M {
   maythrow(i) {
     try {
       if (i <= 5) throw new MyError();
-    } catch(e) { throw e; }
+    } catch (e) {
+      throw e;
+    }
   }
 }
 
 loop_test() {
   bool failed = false;
   M m = new M();
   for (Object i in a) {
     try {
       String res = m.maythrow(i);
       failed = true;
-    } on MyError catch(e) { }
+    } on MyError catch (e) {}
     if (!identical(failed, false)) {
       Expect.fail("");
     }
   }
 }
 
 main() {
   for (var i = 0; i < 20; i++) loop_test();
 }
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