fix: [graph.py] small fix to make it work

tools/graph.py

@@ -162,7 +162,7 @@ if args.uuid:
     dot.append('overlap=scale;')
     generated_dot = gen_dot(uuid)
     if len(generated_dot) == 0:
-        print("Empty      graph for uuid: {}".format(uuid))
+        print("Empty graph for uuid: {}".format(uuid))
         exit()
     print("Generating graph for uuid: {}".format(uuid))
     dot += generated_dot
@@ -189,7 +189,7 @@ elif args.all:
         # dg.source = '\n'.join(dot)
 
         dg = Digraph(format='png', body=dot)
-        # print(dg.source)
-        dg.render(engine='dot', filename='graphs/{}'.format(uuid), cleanup=False)
+        #print(dg.source)
+        dg.render(filename='graphs/{}'.format(uuid))
 else:
     exit("No parameters given, use --help for more info.")