Book: fix section scopes and titles.  
Book: fix section scopes and titles.  

Patch by: Julian Foad <julianfoad@btopenworld.com>

* doc/book/book/ch08.xml:
  Fixed scopes and titles of the six second-level sections, two of which did
  not even have <sect2> and <title> elements.

  Correct the second "foo.c" to "bar.c" in one "svn log" example.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion