In Xcode 6, when I try to snap an image to the edge of a UICollectionViewCell , auto-layout creates a -8.0 constraint. What changed? I tried to find release notes or documentation updates, but didn't see anything.
- Notice that the image faces the edges of the collection cell.

- Frame X and Y are zero

- Adding constraints for the leading space and trailing space in the container field results in -8.0 settings

Why is this happening and what is the preferred approach for edge-to-edge content?
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