Todd Gamblin 9b1f05df00 concretizer bugfix: fix generations of conditionals for dependencies ... Spack was generating the same dependency connstraints twice in the output ASP: ``` declared_dependency("abinit", "hdf5", "link") :- node("abinit"), variant_value("abinit", "mpi", "True"), variant_value("abinit", "mpi", "True"). ``` This was because `AspFunction` was modifying itself when called. - [x] fix `AspFunction` so that every call returns a new object		2020-11-17 10:04:13 -08:00
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spack	concretizer bugfix: fix generations of conditionals for dependencies	2020-11-17 10:04:13 -08:00