教程问题反馈：第2章 小程序代码组成WXML 模板

<!--
{
  index: 0,
  msg: 'this is a template',
  time: '2016-06-18'
}
-->

the definition of “item” is  missing in front of all data.

so it should be like this:

<!--
{
  item:
  {index: 0,
  msg: 'this is a template',
  time: '2016-06-18'}
}
-->