Stripping certain characters using Hpricot

I have been using Hpricot for a while now and its great.
I wanted to know can Hpricot help me in stripping certain characters
like '//<![CDATA[ ' and '//]]>' because I need to strip them in order
to get the exact differences by htmldiff.
I just want to get rid of the //<![CDATA[ and //]]> and not the data
between them


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