Finish issue #49 ("ch09: missing svnversion example showing output for
a partial/sparse checkout").
* src/en/book/ch09-reference.xml (svn.ref.svnversion.re.examples): Document the 'P' code which svnversion uses.
Authored by: cmpilato@gmail.com 2011-07-19
Parent: [r3912]
Child: [r3914]
