M lib/github/markup.rb → lib/github/markup.rb

@@ -46,7 +46,7 @@ end
 
     def renderer(filename)
       @@markups.each do |key, value|
-        if Regexp.compile("(#{key})$") =~ filename
+        if Regexp.compile("\\.(#{key})$") =~ filename
           return value
         end
       end

M test/markup_test.rb → test/markup_test.rb

@@ -24,5 +24,6 @@
   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 false, GitHub::Markup.can_render?('README.cmd')
   end
 end