Case-insensitive on just markdown

Author: bkeepers

Gemfile

@@ -8,3 +8,4 @@ gem "creole", "~>0.3.6"
 gem "wikicloth", "=0.8.1"
 gem "asciidoctor", "= 0.1.4"
 gem "rake"
+gem "pry"

lib/github-markup.rb

@@ -1,6 +1,6 @@
 module GitHub
   module Markup
-    VERSION = '1.2.1'
+    VERSION = '1.2.1.rmd'
     Version = VERSION
   end
 end

lib/github/markup/implementation.rb

@@ -21,7 +21,7 @@ def match?(filename)
 
     private
       def file_ext_regexp
-        @file_ext_regexp ||= /\.(#{regexp})\z/i
+        @file_ext_regexp ||= /\.(#{regexp})\z/
       end
     end
   end

lib/github/markup/markdown.rb

@@ -25,7 +25,7 @@ class Markdown < Implementation
       }
 
       def initialize
-        super(/md|rmd|mkdn?|mdwn|mdown|markdown|litcoffee/)
+        super(/md|rmd|mkdn?|mdwn|mdown|markdown|litcoffee/i)
       end
 
       def load

test/markup_test.rb

@@ -38,6 +38,8 @@ def test_knows_what_it_can_and_cannot_render
     assert_equal false, GitHub::Markup.can_render?('README.html')
     assert_equal true, GitHub::Markup.can_render?('README.markdown')
     assert_equal true, GitHub::Markup.can_render?('README.rmd')
+    require 'pry'
+    binding.pry
     assert_equal true, GitHub::Markup.can_render?('README.Rmd')
     assert_equal false, GitHub::Markup.can_render?('README.cmd')
     assert_equal true, GitHub::Markup.can_render?('README.litcoffee')