unnormalize (REXML::Text)

    # File temp/text.rb, line 294
                    def Text::unnormalize( string, doctype=nil, filter=nil, illegal=nil )
                            rv = string.clone
                            rv.gsub!( /\r\n?/, "\n" )
                            matches = rv.scan( REFERENCE )
                            return rv if matches.size == 0
                            rv.gsub!( NUMERICENTITY ) {|m|
                                    m=$1
                                    m = "0#{m}" if m[0] == ?x
                                    [Integer(m)].pack('U*')
                            }
                            matches.collect!{|x|x[0]}.compact!
                            if matches.size > 0
                                    if doctype
                                            matches.each do |entity_reference|
                                                    unless filter and filter.include?(entity_reference)
                                                            entity_value = doctype.entity( entity_reference )
                                                            re = /&#{entity_reference};/
                                                            rv.gsub!( re, entity_value ) if entity_value
                                                    end
                                            end
                                    else
                                            matches.each do |entity_reference|
                                                    unless filter and filter.include?(entity_reference)
                                                            entity_value = DocType::DEFAULT_ENTITIES[ entity_reference ]
                                                            re = /&#{entity_reference};/
                                                            rv.gsub!( re, entity_value.value ) if entity_value
                                                    end
                                            end
                                    end
                                    rv.gsub!( /&amp;/, '&' )
                            end
                            rv
                    end