handbook:
              disks/chapter.sgml    1.283 -> 1.285
       kernelconfig/chapter.sgml    1.181 -> 1.183
       ppp-and-slip/chapter.sgml    1.177 -> 1.179
           printing/chapter.sgml    1.113 -> 1.114
           security/chapter.sgml    1.320 -> 1.321
        serialcomms/chapter.sgml    1.120 -> 1.126