Fix variable reference

No effects were observed on Make-managed files.

Signed-off-by: Alex Nelson <[email protected]>

Author: ajnelson-nist

case_prov/case_prov_dot.py

@@ -863,8 +863,8 @@ def _render_edges(
         "len(invisible_edge_node_pairs) = %d.", len(invisible_edge_node_pairs)
     )
     for invisible_edge_node_pair in invisible_edge_node_pairs:
-        node_id_1 = record[0]
-        node_id_2 = record[1]
+        node_id_1 = iri_to_gv_node_id(invisible_edge_node_pair[0])
+        node_id_2 = iri_to_gv_node_id(invisible_edge_node_pair[1])
         dot_edge = pydot.Edge(node_id_1, node_id_2, style="invis")
         dot_graph.add_edge(dot_edge)