From ab84e8c6055b020f29134b93c86a9ae2ce955706 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sat, 2 Nov 2013 18:26:20 -0500
Subject: [PATCH] add headerPrefix option. fixes #272. misc readme fixes.

---
 README.md     | 9 ++++++++-
 lib/marked.js | 4 +++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index ff295de7f0..0e42c31c2c 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ Minimal usage:
 
 ```js
 console.log(marked('I am using __markdown__.'));
-// Outputs: <p>I am using <i>markdown</i>.</p>
+// Outputs: <p>I am using <strong>markdown</strong>.</p>
 ```
 
 Example using all options:
@@ -170,6 +170,13 @@ Default: `lang-`
 
 Set the prefix for code block classes.
 
+### headerPrefix
+
+Type: `String`
+Default: ``
+
+Set the prefix for header IDs.
+
 ## Access to lexer and parser
 
 You also have direct access to the lexer and parser if you so desire.
diff --git a/lib/marked.js b/lib/marked.js
index 7a07c8ae1a..aa6deb21a6 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -846,6 +846,7 @@ Parser.prototype.tok = function() {
       return '<h'
         + this.token.depth
         + ' id="'
+        + this.options.headerPrefix
         + this.token.text.toLowerCase().replace(/[^\w]+/g, '-')
         + '">'
         + this.inline.output(this.token.text)
@@ -1134,7 +1135,8 @@ marked.defaults = {
   silent: false,
   highlight: null,
   langPrefix: 'lang-',
-  smartypants: false
+  smartypants: false,
+  headerPrefix: ''
 };
 
 /**