`svn help` output in SVN 1.8 and 1.9

Hello,

I'm reading through the nightly SVNBook 1.8 and make more or less
necessary changes to complete it and begin the work on SVNBook 1.9.
I've just noticed that the output of `svn help` is slightly different
in SVN 1.8 and 1.9 command-line clients.

SVN 1.8 shows the version number (take a look at the second line):
[[[
usage: svn <subcommand> [options] [args]
Subversion command-line client, version 1.8.13.
Type 'svn help <subcommand>' for help on a specific subcommand.
]]]

SVN 1.9 does not show the version number:
[[[
usage: svn <subcommand> [options] [args]
Subversion command-line client.
]]]

Was there any special reason to hide the version number here? Or is it a bug?

-- 
With best regards,
Pavel Lyalyakin
VisualSVN Team