From 71a8ade32295c65aab346e38dc4d8f148b2f5f0b Mon Sep 17 00:00:00 2001
From: Federico Soave <fede.covr@gmail.com>
Date: Mon, 28 Jul 2014 15:23:31 +0200
Subject: [PATCH] trim excess dashes from heading IDs

---
 lib/marked.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/marked.js b/lib/marked.js
index 142eccf00a..519dd1375c 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -790,7 +790,7 @@ Renderer.prototype.heading = function(text, level, raw) {
     + level
     + ' id="'
     + this.options.headerPrefix
-    + raw.toLowerCase().replace(/[^\w]+/g, '-')
+    + raw.toLowerCase().replace(/[^\w]+/g, '-').replace(/^\-+|\-+$/g, '')
     + '">'
     + text
     + '</h'