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Release notes
Version Control API is going stable with 5.x-2.0-rc1, so the SVN backend has no reason to remain labeled as alpha. In fact, pretty much all features in here have been tested sufficiently well to make me claim bug-free operation, or at least no regressions whatsoever compared to the 5.x-1.x releases. Should reality prove me wrong (...nevaah!) then you can hunt us down in the issue queue.
And now, do the upgrade. It's gonna be great, you're gonna love it!™
Oh, and by the way, this is exactly the same code as in the SVN backend's 5.x-2.0-alpha1 release. I just didn't find any issues in the SVN backend itself, but it still doesn't deserve being alpha so we need another release. If you're already running the alpha1, there's no need to update at the moment.