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Merging Xcode project files
I've been using Mercurial for my revision control needs with a small team working on a side project and we seem to be running into a lot of problems dealing with the merging of project files, Xcode project files in this case.
Is there some accepted wisdom for handling these types of merges? Is there a specific merge tool we should be using? What do others do that have larger teams working on Xcode projects? Any advice / help would be appreciated.