[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/uproot_browser/tree.py

@@ -8,7 +8,7 @@
 import functools
 from collections.abc import Mapping
 from pathlib import Path
-from typing import Any, TypedDict, Literal
+from typing import Any, Literal, TypedDict
 
 import uproot
 import uproot.reading
@@ -46,10 +46,12 @@ class MetaDict(MetaDictRequired, total=False):
 def is_dir(item: Any) -> bool:
     return False
 
+
 @is_dir.register
 def _(item: uproot.reading.ReadOnlyDirectory) -> Literal[True]:
     return True
 
+
 @is_dir.register
 def _(item: uproot.behaviors.TBranch.HasBranches) -> bool:
     return len(item.branches) > 0
@@ -59,6 +61,7 @@ def _(item: uproot.behaviors.TBranch.HasBranches) -> bool:
 def get_children(item: Any) -> set[str]:
     raise RuntimeError("Should not be called, protect with is_dir!")
 
+
 @get_children.register
 def _(item: Mapping) -> set[str]:
     return {