Greg Becker da9a562182 environments: allow 'add' command to add virtuals (#13787) ... This PR allows virtual packages to be added to the specs list using the add command. Virtual packages are already allowed in named lists in spack environments/stacks, and they are already allowed in the specs list when added using the yaml directly.		2019-12-09 12:23:03 -08:00
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spack	environments: allow 'add' command to add virtuals (#13787)	2019-12-09 12:23:03 -08:00