normalize_space (REXML::Functions)

    # File src/rexml/functions.rb, line 216
                    def Functions::normalize_space( string=nil )
                            string = string(@@node) if string.nil?
                            if string.kind_of? Array
                                    string.collect{|x| string.to_s.strip.gsub(/\s+/um, ' ') if string}
                            else
                                    string.to_s.strip.gsub(/\s+/um, ' ')
                            end
                    end