old_contents: define(function(require) {
  
    var test = require('../../test');
  
    require('./a.less');
    test.assert(find('a_less'), 'a.less is ok');
    test.done();
  
  
    function find(flag) {
      var styles = document.getElementsByTagName('styles');
  
      for (var i = 0, len = styles.length; i < len; i++) {
        var s = styles[i];
        var id = s.id;
        if (id && ~id.indexOf(flag)) {
          return s;
        }
      }
    }
  
  });
  
new_contents: define(function(require) {
  
    var test = require('../../test');
  
    require('./a.less');
    test.assert(find('a_less'), 'a.less is ok');
    test.done();
  
  
    function find(flag) {
      var styles = document.getElementsByTagName('style');
  
      for (var i = 0, len = styles.length; i < len; i++) {
        var s = styles[i];
        var id = s.id;
        if (id && ~id.indexOf(flag)) {
          return s;
        }
      }
    }
  
  });
  
subject: fix a bug