注释
comment 标记让你能够在 Liquid 模板中书写的内容不被输出。
任何书写在 comment 起始与结束标记之间的内容都不会被输出，如果是 Liquid 代码则不会被执行。
输入
Anything you put between {% comment %} and {% endcomment %} tags
is turned into a comment.
输出
Anything you put between tags
is turned into a comment.