def every_xsl_doc
      every_page do |page|
        if (block_given? && page.xsl?)
          if (doc = page.doc)
            yield doc
          end
        end
      end
    end
def every_xsl_doc
      every_page do |page|
        if (block_given? && page.xsl?)
          if (doc = page.doc)
            yield doc
          end
        end
      end
    end
Pass every XML Stylesheet (XSL) that the agent parses to a given
 block.

 @yield [doc]
   The block will be passed every XSL Stylesheet (XSL) parsed.

 @yieldparam [Nokogiri::XML::Document] doc
   A parsed XML document.

 @see http://nokogiri.rubyforge.org/nokogiri/Nokogiri/XML/Document.html