Todd Gamblin 82b7067fdf Refactored external packages slightly. ... - Move `Spec.__cmp__` out of spec, into concretize as `cmp_specs`. - `Spec.__cmp__` was never called (except explicitly) due to rich comparison operators from `key_ordering` - Refactor `_find_other_spec` to free function `find_spec`. Add a test for it to make sure it works.		2016-03-10 01:29:55 -08:00
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spack	Refactored external packages slightly.	2016-03-10 01:29:55 -08:00