# File lib/yard/templates/helpers/html_helper.rb, line 273
      def link_url(url, title = nil, params = {})
        title ||= url
        title.gsub!(/[\r\n]/, ' ')
        params = SymbolHash.new(false).update(
          :href => url,
          :title  => h(title)
        ).update(params)
        params[:target] ||= '_parent' if url =~ /^(\w+):\/\//
        "<a #{tag_attrs(params)}>#{title}</a>".gsub(/[\r\n]/, ' ')
      end