Updating WordPress through Subversion
Bloggers managing a WordPress-based site uploaded to server via subversion (whose client might be pre-installed on the host server) have a very quick way to update their WP-version to the last release.
A plugin by Sunny Ripert aka Sunfox called WordPress “Svn Update” makes exactly this job.
All you have to do is to go to your Options / SVN Update page and press Update. And your WordPress is immediately updated through Subversion!
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P.S.: please check WordPress Codex for further information on installing WordPress through Subversion.