Merge the following from the English version:

1.27 -> 1.187 books/handbook/disks/chapter.sgml

Submitted by: FURUKAWA Jumpei <bell at f-bell dot net>
Reviewed by: Ryusuke Suzuki <ryusuke at nucl dot sci dot hokudai dot ac dot jp>
References: [doc-jp-work 811, 888, 926]