dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/do_test.dart

 // Copyright (c) 2011, 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.
 
 import "package:expect/expect.dart";
 
 void do1() {
   bool cond = true;
   var result = 0;
   var x = 0;
   do {
     if (x == 10) cond = false;
     result += x;
     x = x + 1;
-  } while(cond);
+  } while (cond);
   Expect.equals(55, result);
 }
 
 void do2() {
   var t = 0;
   var i = 0;
   do {
     t = t + 10;
     i++;
   } while (i == 0);
@@ skipping 13 matching lines @@
   var result = 0;
   var i = 0;
   do {
     if (i == 9) cond1 = false;
     var cond2 = true;
     var j = 0;
     do {
       if (j == 9) cond2 = false;
       result = result + 1;
       j = j + 1;
-    } while(cond2);
+    } while (cond2);
     i = i + 1;
-  } while(cond1);
+  } while (cond1);
   Expect.equals(100, result);
 }
 
 void main() {
   do1();
   do2();
   do3();
   do4();
 }