[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

@@ -51,10 +51,12 @@ def is_dir(item: Any) -> bool:  # noqa: ARG001
 def _(item: uproot.reading.ReadOnlyDirectory) -> Literal[True]:  # noqa: ARG001
     return True
 
+
 @is_dir.register
 def _(item: uproot.behaviors.TBranch.HasBranches) -> bool:
     return len(item.branches) > 0
 
+
 @is_dir.register
 def _(item: uproot.behaviors.RNTuple.HasFields) -> bool:
     return len(item.keys()) > 0
@@ -156,7 +158,9 @@ def _process_item_tfile(
 
 
 @process_item.register
-def _process_item_ttree(uproot_object: uproot.TTree | uproot.behaviors.RNTuple.RNTuple) -> MetaDict:
+def _process_item_ttree(
+    uproot_object: uproot.TTree | uproot.behaviors.RNTuple.RNTuple,
+) -> MetaDict:
     """
     Given an tree, return a rich.tree.Tree output.
     """