dart2js: run dartfmt on tests

tests/compiler/dart2js/sourcemaps/data/operators_test_file.dart

 // Copyright (c) 2015, 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.
 
 // Test file for testing source mappings of operations.
 
 var counter = 0;
 
 void record(result) {
   counter++;
 }
 
 main(args) {
   counter++;
-  operations(args.length > 0,
-      0, 1.5, args[0], new Complex(0, 1), new Complex(1.5, 2.5));
+  operations(args.length > 0, 0, 1.5, args[0], new Complex(0, 1),
+      new Complex(1.5, 2.5));
   return counter;
 }
 
 void operations(cond, a, b, c, d, e) {
   if (cond) record(a + a);
   if (cond) record(a + b);
   if (cond) record(a + c);
   if (cond) record(a + d);
   if (cond) record(a + e);
   if (cond) record(b + a);
@@ skipping 24 matching lines @@
 
   const Complex(this.re, this.im);
 
   operator +(Complex other) => new Complex(re + other.re, im + other.im);
 
   // TODO(johnniwinther): Support implicit null check in '=='.
   //operator ==(Complex other) => re == other.re && im == other.im;
 
   int get hashCode => 13 * re.hashCode + 17 * im.hashCode;
 }