I'm scrapling an html page with nokogiri and i want to strip out all style attributes.
How can I achieve this? (i'm not using rails so i can't use it's sanitize method and i don't want to use sanitize gem 'cause i want to blacklist remove not whitelist)

html = open(url)
doc = Nokogiri::HTML(html.read)
doc.css('.post').each do |post|
puts post.to_s
end

=> <p><span style="font-size: x-large">bla bla <a href="http://torrentfreak.com/netflix-is-killing-bittorrent-in-the-us-110427/">statistica</a> blabla</span></p>

I want it to be

=> <p><span>bla bla <a href="http://torrentfreak.com/netflix-is-killing-bittorrent-in-the-us-110427/">statistica</a> blabla</span></p>
html nokogiri sanitize
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