Version Control With Subversion Source

* ch03-advanced-topics.xml
Change "switch" to "option"; remove hyphen from "multiline" per O'Reilly
word list.

* ch07-customizing-svn.xml
Remove hyphen from "multiline".

* ch09-reference.xml
Fix various typos; note --diff-copy-from option to 'svnlook diff'
and --full-paths option to 'svnlook tree'; another "multiline" fix.

Patch by: Larry Shatzer <larrys {at} gmail.com>