polish

crusaderky · crusaderky · commit 1ae20fe5b0f5 · 2021-01-22T14:44:20.000Z
diff --git a/dask/graphsurgery.py b/dask/graphsurgery.py
@@ -175,6 +175,7 @@ def bind(children: T, parents, *, omit=None, seed: Hashable = None) -> T:
 
     if seed is None:
         seed = uuid.uuid4().bytes
+    # parents=None is a special case invoked by the one-liner wrapper clone() below
     blocker = drop(parents) if parents is not None else None
     unpacked, repack = unpack_collections(children)
 
