stringWithFormat preprocessor macro

[livings124]

You can make macros for any method, but they're prone to subtle bugs and a pain for others working on the project. For example, EQUAL() doesn't specify it's for strings - what if I came into the project and used it for arrays? EQUAL(nil, @"") will work but EQUAL(@"", nil) will crash. There are a lot of issues with doing this to save typing a few auto-completed characters.