Downgrading Subversion Working Copy

Sometimes, an IDE coupled to SVN (ex: Intellij) might upgrade your subversion working copy to the latest SVN server format that is incompatible with the command line svn client you have. In this case, if your distro has a command line svn of the latest version, you are probably fine. But if you don't have such luck (for ex: being a MacOS user who has v 1.4 of svn command line), you might want to downgrade the working copy using instructions here.