If you have worked with Subversion and iOS you are probably aware of this problem. Whenever you are going to do something with a file that has an at sign in its name you can’t. For instance imagine you’ve just added a file for retina and try to add it to the repository (XCode can do this too):

The message from Subversion will be:

That’s because Subversion uses the @ for other purposes.

From the Subversion book:

…how does svn know whether news@11 is the name of a directory in my tree or just a syntax for “revision 11 of news”? Thankfully, while svn will always assume the latter, there is a trivial workaround…

The workaround is as simple as adding an at sign to the end of the path: