[oXygen-user] Reversing an SVN ignore

This isn't really an Oxygen/DITA request, but since Subversion is included in Oxygen, here goes: I use SVN to check out/in my content. Oxygen usually creates a TMP and an OUT folder. Generally these folders contain content I don't need, so I ignore them using the SVN:ignore command in Subversion. But one of my co-writers checked in the content in the OUT folder for one of the projects, and I need that content. How do I reverse the SVN:ignore on a folder? I checked online & wasn't able to find anything useful or that made sense. I looked through some of the files in the .SVN folder, but I don't see anything that makes sense that I could edit to undo this.