Todd Gamblin a1d9a56a43 specs: remove "or ''" from Spec comparisons ... Since `lazy_lexicographic_ordering` handles `None` comparison for us, we don't need to adjust the spec comparators to return empty strings or other type-specific empty types. We can just leverage the None-awareness of `lazy_lexicographic_ordering`. - [x] remove "or ''" from `_cmp_iter` in `Spec` - [x] remove setting of `self.namespace` to `''` in `MockPackage`		2021-03-31 14:39:23 -07:00
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spack	specs: remove "or ''" from Spec comparisons	2021-03-31 14:39:23 -07:00