Federico Ficarelli 6093d6df7d Reworked the graphviz package (#6865) ... The url in graphviz has been fixed and its version has been updated to the latest available (2.40.1). Added variants for expat, qt, gtk+ and ghostscript.		2018-01-15 15:26:14 +01:00
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spack	Reworked the graphviz package (#6865)	2018-01-15 15:26:14 +01:00