From 32f2f7f744c4ec15fb7b8ba243bf76c8c9970b26 Mon Sep 17 00:00:00 2001
From: Joe-noh <goflb.jh@gmail.com>
Date: Wed, 3 May 2017 13:23:32 +0900
Subject: [PATCH] use original title if slugified title is empty

---
 lib/utils/md-renderer.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/utils/md-renderer.ts b/lib/utils/md-renderer.ts
index 214da611..ca1525ad 100644
--- a/lib/utils/md-renderer.ts
+++ b/lib/utils/md-renderer.ts
@@ -53,7 +53,7 @@ export class MdRenderer {
   }
 
   saveHeading(title: string, parent:MarkdownHeading = {id:null, children: this.headings}) :MarkdownHeading {
-    let slug = slugify(title);
+    let slug = slugify(title) || title;
     let id = slug;
     if (parent && parent.id) id = `${parent.id}/${id}`;
     parent.children = parent.children || {};