Fix inconsistent local var name in test function

src/testing/graph_topology_testing.rs

@@ -473,21 +473,21 @@ macro_rules! graph_topology_tests {
                     "unexpected incidence count for vertex {:?}",
                     vertices[i]
                 );
-                let mut remaining = incidences[i].clone();
+                let mut expected = incidences[i].clone();
                 for incidence in graph.incidences(vertices[i]) {
-                    let pos = remaining
+                    let pos = expected
                         .iter()
                         .position(|(v, e)| *v == incidence.0 && *e == incidence.1)
                         .expect(&format!(
                             "unexpected incidence {incidence:?} of vertex {:?} from the iterator",
                             vertices[i]
                         ));
-                    remaining.swap_remove(pos);
+                    expected.swap_remove(pos);
                 }
                 assert!(
-                    remaining.is_empty(),
+                    expected.is_empty(),
                     "expected incidences {:?} of vertex {:?} were not matched by the iterator",
-                    remaining,
+                    expected,
                     vertices[i]
                 );
             }