From d5f137bc867b0801538403241bf8544689ee614a Mon Sep 17 00:00:00 2001
From: Ben Balter <ben.balter@github.com>
Date: Sat, 5 Oct 2013 11:26:26 -0400
Subject: [PATCH 1/3] downcase lexers before passing to Pygments

---
 lib/jekyll/tags/highlight.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/jekyll/tags/highlight.rb b/lib/jekyll/tags/highlight.rb
index e8059edb..687ef8c8 100644
--- a/lib/jekyll/tags/highlight.rb
+++ b/lib/jekyll/tags/highlight.rb
@@ -13,7 +13,7 @@ module Jekyll
 
       def initialize(tag_name, markup, tokens)
         super
-        if markup.strip =~ SYNTAX
+        if markup.downcase.strip =~ SYNTAX
           @lang = $1
           @options = {}
           if defined?($2) && $2 != ''

From 844cc615e4631902c9508381e2988047048b906c Mon Sep 17 00:00:00 2001
From: Ben Balter <ben.balter@github.com>
Date: Sun, 6 Oct 2013 15:55:16 -0400
Subject: [PATCH 2/3] actually downcase lexer

---
 lib/jekyll/tags/highlight.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/jekyll/tags/highlight.rb b/lib/jekyll/tags/highlight.rb
index 687ef8c8..2ea144df 100644
--- a/lib/jekyll/tags/highlight.rb
+++ b/lib/jekyll/tags/highlight.rb
@@ -13,8 +13,8 @@ module Jekyll
 
       def initialize(tag_name, markup, tokens)
         super
-        if markup.downcase.strip =~ SYNTAX
-          @lang = $1
+        if markup.strip =~ SYNTAX
+          @lang = $1.downcase
           @options = {}
           if defined?($2) && $2 != ''
             $2.split.each do |opt|

From 9b0a7b3438fbd5efd0704100e1db31932c901098 Mon Sep 17 00:00:00 2001
From: Ben Balter <ben.balter@github.com>
Date: Sun, 6 Oct 2013 16:06:20 -0400
Subject: [PATCH 3/3] test for lexer case insensitivity

---
 test/test_tags.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/test_tags.rb b/test/test_tags.rb
index fe16faa5..135bdd10 100644
--- a/test/test_tags.rb
+++ b/test/test_tags.rb
@@ -69,6 +69,9 @@ CONTENT
 
       tag = Jekyll::Tags::HighlightBlock.new('highlight', 'ruby linenos=table cssclass=hl', ["test", "{% endhighlight %}", "\n"])
       assert_equal({ 'cssclass' => 'hl', 'linenos' => 'table' }, tag.instance_variable_get(:@options))
+
+      tag = Jekyll::Tags::HighlightBlock.new('highlight', 'Ruby ', ["test", "{% endhighlight %}", "\n"])
+      assert_equal "ruby", tag.instance_variable_get(:@lang), "lexers should be case insensitive"
     end
   end