docs: fix code block closing (#1418)

diff --git a/docs/zh/guide/advanced/navigation-guards.md b/docs/zh/guide/advanced/navigation-guards.md
index 703d30867721031feda0d65542c134b2a3850b3c..8ebc3260c4b367c66b9a3c6ae61bf1c3b036564e 100644 (file)
--- a/docs/zh/guide/advanced/navigation-guards.md
+++ b/docs/zh/guide/advanced/navigation-guards.md
@@ -45,6 +45,7 @@ router.beforeEach((to, from) => {
       return { name: 'Login' }
     }
   })
+```
 
 如果遇到了意料之外的情况，可能会抛出一个 `Error`。这会取消导航并且调用 [`router.onError()`](../../api/#onerror) 注册过的回调。