update

src/outils_graph.py

@@ -85,7 +85,7 @@ def add_nodes_metro(dot, dico, relevant_nodes = -1):
 def add_edges_metro(dot, dico):
     for e in dico["edges"]:
         dot.edge(e['A'], e['B'], 
-                 arrowhead = "none", #https://graphviz.org/doc/info/arrows.html
+                 #arrowhead = "none", #https://graphviz.org/doc/info/arrows.html
                  arrowsize= "1", #If the arrowhead is 'none' this parameter doesn't change anything
                  penwidth= "2"
                  )