Fix formatting

src/testing/bfs_testing.rs

@@ -187,7 +187,8 @@ macro_rules! bfs_tests {
             assert!(
                 found == vertices[7] || found == vertices[8],
                 "unexpected nearest match vertex {found:?}, should be {:?} or {:?}",
-                vertices[7], vertices[8]
+                vertices[7],
+                vertices[8]
             );
         }