How can I put a playground under git source control?
When I try "Create working copy ..." in Xcode 7 beta 6 I get an error popup "All projects are already under source control. There is no need to create additional working copies as all of the workspace is already versioned under source control." The "Commit ..." menu item is greyed out, however.
I would like to compare the current state of my playground code with previous versions.