fix black

Author: refraction-ray

tensorcircuit/quantum.py

@@ -75,7 +75,7 @@ def _reachable(nodes: List[AbstractNode]) -> List[AbstractNode]:
 
 
 def reachable(
-    inputs: Union[AbstractNode, Iterable[AbstractNode], Edge, Iterable[Edge]]
+    inputs: Union[AbstractNode, Iterable[AbstractNode], Edge, Iterable[Edge]],
 ) -> List[AbstractNode]:
     """Computes all nodes reachable from `node` or `edge.node1` by connected edges.