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2b53ec3d1e
Change `-W help` to display edition level. `-W help` was not honoring the `--edition` flag when displaying the default lint level. It was using the edition for sorting, but not for the final display. This isn't important right now as there aren't any edition-specific lint levels. Also, the `declare_lint` macro is broken and doesn't even allow setting them right now. However, I figure it wouldn't hurt to fix this before I forget about it, in case edition-specific lints are ever used in the future.