Version Control With Subversion Source

* en/book/ch09-reference.xml
(svn.ref.svnlook.c.diff): Fix a user-reported disconnected between
an example and the text which describes it. While here, update
and expand the example.

Reported by: Jens M. Felderhoff <j.m.f{__AT__}gmx.li>

* en/book/ch06-server-configuration.xml
(svn.serverconfig.pathbasedauthz.getting-started): Add a note about
access file paths using "internal style", and fix a typo.

Suggested by: danielsh

Merge from ^/trunk/en r4374-r4375 (minor tweaks re: repository layouts).

* en/book/ch04-branching-and-merging.xml
(svn.branchmerge.maint.layout): Minor wording tweaks for clarity
regarding repository layouts.

* en/book/ch05-repository-admin.xml
(svn.reposadmin.basics): Reword description of the 'format' file so
it doesn't use the term "repository layout", which is used elsewhere
to describe how versioned stuff is organized inside the repository.

Merge from ^/trunk/en r4370-r4372 (minor, mostly formatting, tweaks).

* en/book/ch05-repository-admin.xml
Fix a syntax buglet introduced in r4371.

* en/book/ch03-advanced-topics.xml,
* en/book/ch04-branching-and-merging.xml,
* en/book/ch05-repository-admin.xml,
* en/book/ch06-server-configuration.xml
Formatting/markup changes, mostly.

* en/book/ch02-basic-usage.xml
Just a couple of minor edits for clarity.

Merge from ^/trunk/en r4368 (minor svn status reference tweaks).