module MD
    def renderer
        Redcarpet::Render::HTML.new(
            :no_intra_emphasis  => true,
            :tables             => true,
            :fenced_code_blocks => true,
            :disable_indented_code_blocks   => true,
            :autolink           => true,
            :filter_html        => false,
            :with_toc_data      => true
        )
    end

    def markdown
        Redcarpet::Markdown.new(renderer)
    end

    def md
        markdown.render(yield)
    end
end
helpers MD