auto_link_email_addresses

# File actionpack/lib/action_view/helpers/text_helper.rb, line 572
        def auto_link_email_addresses(text, html_options = {})
          body = text.dup
          text.gsub(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
            text = $1

            if body.match(/<a\b[^>]*>(.*)(#{Regexp.escape(text)})(.*)<\/a>/)
              text
            else
              display_text = (block_given?) ? yield(text) : text
              mail_to text, display_text, html_options
            end
          end
        end