Add the possibility to fetch input from a string rather than a webpage

I think this is what you wanted:

require 'rubygems'
require 'scrubyt'

garbage = <<-SZ
  <html>
    <body>
      <table>
        <tr><td>1</td></tr>
        <tr><td color="red">2</td></tr>
        <tr><td>3</td></tr>                
      </table>
    </body>
  </html>
SZ

google_data = Scrubyt::Extractor.define do
  fetch nil, :html => garbage
  
  redcell "//td[@color='red']"
end

puts google_data.to_xml

outputs

  2