docs: lineNumbers example should add space to make IDE happy (#1262)

atian25 · ulivz · commit 78cc60dfce52 · 2019-02-08T01:44:47.000+08:00
diff --git a/packages/docs/docs/zh/guide/markdown.md b/packages/docs/docs/zh/guide/markdown.md
@@ -165,7 +165,7 @@ Danger zone, do not proceed
 **Input**
 
 ````
-``` js{4}
+``` js {4}
 export default {
   data () {
     return {
