{{{ foo }}}) have been removed in favor of the v-html directive

心情滿悶的，下午時狂踩Vue.js的雷，發現書有太多值得注意細節沒講，搞到最後忍痛換另本書讀看看了。

下面應算是小小雷：
https://vuejs.org/v2/guide/migration.html#HTML-Interpolation-removed
HTML interpolations ({{{ foo }}}) have been removed in favor of the v-html directive.