Add comment [skip ci]

Author: Martin Durant

zarr/convenience.py

@@ -73,6 +73,8 @@ def open(store=None, mode='a', **kwargs):
     path = kwargs.get('path', None)
     # handle polymorphic store arg
     clobber = mode == 'w'
+    # we pass storage options explicitly, since normalize_store_arg might construct
+    # a store if the input is a fsspec-compatible URL
     store = normalize_store_arg(store, clobber=clobber,
                                 storage_options=kwargs.pop("storage_options", {}))
     path = normalize_storage_path(path)