Matthew LeGendre 265c30b943 Update packaging tutorial (#6270) ... * Allow types and 'any' in variant definitions. - Previously variant values had to be a tuple or a callable predicate. - This allows 'any' as shorthand for `lambda x: True` and type objects as shorthand for "any value of this type". - Makes variant definitions more readable, keeps lambdas out of packages for common cases. * Update packaging tutorial * Fix bad file reference in packaging tutorial		2017-11-12 20:09:12 -07:00
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spack	Update packaging tutorial (#6270)	2017-11-12 20:09:12 -07:00