[PATCH] Update block formatting to behave like Xcode

[Tony Arnold]

This looks great, Brian!

**Why is formatting within blocks/closures different to what I define for code that's not inside a block?** 
It really threw me when code within blocks started being wrapped when I'd already set a ColumnLimit of 0.

I'm quite keen to see this patch merged, if only to get familiar formatting back to my blocks in Xcode projects.


http://reviews.llvm.org/D9237

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