>> require "hpricot" => true >> Hpricot('').build NoMethodError: undefined method `build' for #<Hpricot::Doc> from (irb):2 >> doc = Hpricot('') {} => #<Hpricot::Doc> >> doc.build ArgumentError: block not supplied from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/hpri</hpricot::doc></hpricot::doc>…