Few tweaks
* ru/book/ch07.xml
Warning: Inconsistent synchronization, merge with r2120:r2121 of
en/book/ch07.xml has been performed, but the range r1943:r2120 has been
omitted. It needs to be considered on future syncs.
* ru/book/appa.xml
ru/book/appb.xml
ru/book/appc.xml
ru/book/ch00.xml
ru/book/ch01.xml
ru/book/ch02.xml
ru/book/ch03.xml
ru/book/ch04.xml
ru/book/ch05.xml
ru/book/ch06.xml
ru/book/ch08.xml
ru/book/copyright.xml
ru/book/foreword.xml
ru/book/styles.css
Update to mirror a current state of en/book/* (up to r2152)
