diff --git a/examples/docs/en-US/tree.md b/examples/docs/en-US/tree.md
index 7a41b008b..ef7a9c46f 100644
--- a/examples/docs/en-US/tree.md
+++ b/examples/docs/en-US/tree.md
@@ -250,7 +250,7 @@ Only one node among the same level can be expanded at one time.
::: demo
```html
-
+