unnormalize (REXML::Text)

    # File temp/text.rb, line 382
        def Text::unnormalize( string, doctype=nil, filter=nil, illegal=nil )
          string.gsub( /\r\n?/, "\n" ).gsub( REFERENCE ) { |ref|
            if ref[1] == ?#
              if ref[2] == ?x
                [ref[3...-1].to_i(16)].pack('U*')
              else
                [ref[2...-1].to_i].pack('U*')
              end
            elsif ref == '&amp;'
              '&'
            elsif filter and filter.include?( ref[1...-1] )
              ref
            elsif doctype
              doctype.entity( ref[1...-1] ) or ref
            else
              entity_value = DocType::DEFAULT_ENTITIES[ ref[1...-1] ]
              entity_value ? entity_value.value : ref
            end
          }
        end