compatible with RedCarpet 2.0+

lib/gollum/markup.rb

@@ -447,6 +447,18 @@ module Gollum
         data = extract_code(data)
         data = extract_tags(data)
 
+        if Gem::Version.new(Redcarpet::VERSION) > Gem::Version.new("1.17.2")
+          html_renderer = Redcarpet::Render::HTML.new({
+            :autolink => true,
+            :fenced_code_blocks => true, 
+            :tables => true,
+            :strikethrough => true,
+            :lax_htmlblock => true,
+            :no_intraemphasis => true
+          })
+          markdown = Redcarpet::Markdown.new(html_renderer)
+          data = markdown.render(data)
+        else
           flags = [
             :autolink,
             :fenced_code,
@@ -456,6 +468,7 @@ module Gollum
             :no_intraemphasis
           ]
           data = Redcarpet.new(data, *flags).to_html
+        end
         data = process_tags(data)
         data = process_code(data)