# File lib/html/pipeline/@mention_filter.rb, line 126
      def link_to_mentioned_user(login)
        result[:mentioned_usernames] |= [login]

        url = base_url.dup
        url << '/' unless url =~ /[\/~]\z/

        "<a href='#{url << login}' class='user-mention'>" \
          "@#{login}" \
          '</a>'
      end