trac #32095: avoid using set_random_seed

Author: dcoudert

src/sage/graphs/digraph.py

@@ -2493,8 +2493,10 @@ def diameter(self, by_weight=False, algorithm=None, weight_function=None,
 
         :trac:`32095` is fixed::
 
-            sage: set_random_seed(4)
-            sage: G = graphs.RandomGNP(40, 0.4).to_directed()
+            sage: g6 = 'guQOUOQCW[IaDBCVP_IE\\RfxV@WMSaeHgheEIA@tfOJkB~@EpGLCrs'
+            sage: g6 += 'aPIpwgQI_`Abs_x?VWxNJAo@w\\hffCDAW]bYGMIZGC_PYOrIw[Gp['
+            sage: g6 += '@FTgc_O}E?fXAnGCB{gSaUcD'
+            sage: G = Graph(g6).to_directed()
             sage: G.diameter(algorithm='DiFUB', by_weight=False)
             3
             sage: G.diameter(algorithm='DiFUB', by_weight=True)