Check nokogiri gem version before requiring nokogiri
Gives better error messages is using an old nokogiri version
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@ -10,6 +10,8 @@ module Webrat
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VERSION = '0.3.2.1'
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def self.require_xml
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gem "nokogiri", ">= 1.0.6"
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if on_java?
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# We need Nokogiri's CSS to XPath support, even if using REXML and Hpricot for parsing and searching
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require "nokogiri/css"
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