From 7981f06952d15bb284f25711a3ae53391cd1bb8f Mon Sep 17 00:00:00 2001
From: Juanito Fatas <katehuang0320@gmail.com>
Date: Sun, 25 May 2014 23:36:02 +0800
Subject: [ci skip] Update GFM link in guides guidelines.

Also remove a duplicated sentence.
---
 guides/source/ruby_on_rails_guides_guidelines.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/guides/source/ruby_on_rails_guides_guidelines.md b/guides/source/ruby_on_rails_guides_guidelines.md
index 8faf03e58c..f0230b428b 100644
--- a/guides/source/ruby_on_rails_guides_guidelines.md
+++ b/guides/source/ruby_on_rails_guides_guidelines.md
@@ -13,7 +13,7 @@ After reading this guide, you will know:
 Markdown
 -------
 
-Guides are written in [GitHub Flavored Markdown](http://github.github.com/github-flavored-markdown/). There is comprehensive [documentation for Markdown](http://daringfireball.net/projects/markdown/syntax), a [cheatsheet](http://daringfireball.net/projects/markdown/basics), and [additional documentation](http://github.github.com/github-flavored-markdown/) on the differences from traditional Markdown.
+Guides are written in [GitHub Flavored Markdown](https://help.github.com/articles/github-flavored-markdown). There is comprehensive [documentation for Markdown](http://daringfireball.net/projects/markdown/syntax), a [cheatsheet](http://daringfireball.net/projects/markdown/basics).
 
 Prologue
 --------
-- 
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