Fix some operator madness (see incr_op_test for more details.)

tests/compiler/dart2js/unparser_test.dart

 // Copyright (c) 2012, 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('dart:uri');
 #import('parser_helper.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 
 testUnparse(String statement) {
@@ skipping 81 matching lines @@
 }
 
 testGenericTypes() {
   testUnparse('var x=new List<List<int>>();');
   testUnparse('var x=new List<List<List<int>>>();');
   testUnparse('var x=new List<List<List<List<int>>>>();');
   testUnparse('var x=new List<List<List<List<List<int>>>>>();');
 }
 
 testForLoop() {
-  testUnparse('for(;i<100;i++){}');
-  testUnparse('for(i=0;i<100;i++){}');
+  testUnparse('for(;i<100;i++ ){}');
+  testUnparse('for(i=0;i<100;i++ ){}');
 }
 
 testEmptyList() {
   testUnparse('var x=[];');
 }
 
 testClosure() {
   testUnparse('var x=(var x)=> x;');
 }
 
 testIndexedOperatorDecl() {
   testUnparseMember('operator[](int i)=> null;');
   testUnparseMember('operator[]=(int i,int j)=> null;');
 }
 
 testNativeMethods() {
   testUnparseMember('foo()native;');
   testUnparseMember('foo()native "bar";');
   testUnparseMember('foo()native "this.x = 41";');
 }
 
 testPrefixIncrements() {
-  testUnparse('++i;');
+  testUnparse(' ++i;');
   testUnparse('++a[i];');
   testUnparse('++a[++b[i]];');
 }
 
 testConstModifier() {
   testUnparse('foo([var a=const []]){}');
   testUnparse('foo([var a=const{}]){}');
   testUnparse('foo(){var a=const []; var b=const{};}');
   testUnparse('foo([var a=const [const{"a": const [1,2,3]}]]){}');
 }
@@ skipping 282 matching lines @@
   testGetSet();
   testFactoryConstructor();
   testAbstractClass();
   testConflictSendsRename();
   testNoConflictSendsRename();
   testConflictLibraryClassRename();
   testDefaultClassWithArgs();
   testClassExtendsWithArgs();
   testStaticInvocation();
 }