Massimiliano Culpo 581f70ff6f Added custom messages for conflicts directive. fixes #4965 (#5083) ... Users can now add an optional custom message to the conflicts directive. Layout on screen has been changed to improve readability and the long spec is shown in tree format. Two conflicts in `espresso` have been modified to showcase the feature.		2017-08-21 09:20:07 -07:00
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spack	Added custom messages for conflicts directive. fixes #4965 (#5083)	2017-08-21 09:20:07 -07:00