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perl/lib/Graph-Easy-0.76/t/group/0230.txt

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+# groups (with border none)
+group.cities { label: Cities; }
+
+( Cities
+    [ Ulm ] -> [ Lahn ] -> [ Bonn ]
+    -> [ Trier ]
+) { class: cities; background: #ff80a0; border: none; }
+
+[ Koblenz ] -> [ Berlin ]
+[ Frankfurt ]