Readme, wiki, and others choke when using code blocks.

gitlab_html.rb

--- a/lib/redcarpet/render/gitlab_html.rb
+++ b/lib/redcarpet/render/gitlab_html.rb
@@ -3,7 +3,7 @@ class Redcarpet::Render::GitlabHTML < Redcarpet::Render::HTML
     if Pygments::Lexer.find(language)
       Pygments.highlight(code, :lexer => language, :options => {:encoding => 'utf-8'})
     else
-      Pygments.highlight(code, :options => {:encoding => 'utf-8'})
+      Pygments.highlight(code, :lexer => 'bash', :options => {:encoding => 'utf-8'})
     end
   end
 end

This helped me out of a bind. Thank you so much!