Greg Becker 9a637bbd09 modules: allow user to remove arch dir (#24156) ... * allow no arch-dir modules * add tests for modules with no arch * document arch-specific module roots		2021-10-26 13:26:09 -07:00
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spack	modules: allow user to remove arch dir (#24156)	2021-10-26 13:26:09 -07:00