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# Alias of <tt>to_s</tt>.
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# Converts an object into a string suitable for use as a URL query string, using the given <tt>key</tt> as the
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# Note: This method is defined as a default implementation for all Objects for Hash#to_query to work.
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require 'cgi' unless defined?(CGI) && defined?(CGI::escape)
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"#{CGI.escape(key.to_s)}=#{CGI.escape(to_param.to_s)}"