Resolve "Visualize PG"

Closes #27 (closed)

test/test_sfg.py

@@ -691,12 +691,12 @@ class TestConnectExternalSignalsToComponentsMultipleComp:
         out1.input(0).connect(sub1, "S7")
 
         test_sfg = SFG(inputs=[inp1, inp2, inp3, inp4], outputs=[out1])
+        
         assert test_sfg.evaluate(1, 2, 3, 4) == 16
         sfg1.connect_external_signals_to_components()
         assert test_sfg.evaluate(1, 2, 3, 4) == 16
         assert not test_sfg.connect_external_signals_to_components()
 
-
 class TestTopologicalOrderOperations:
     def test_feedback_sfg(self, simple_filter):
         topological_order = simple_filter.get_operations_topological_order()