From 809e0a34b2370bfad51e8f7b9e559bf759452dc7 Mon Sep 17 00:00:00 2001
From: Martin Thoma <info@martin-thoma.de>
Date: Sun, 29 Oct 2023 05:21:54 +0100
Subject: [PATCH 1/2] MAINT: Apply pre-commit hooks

---
 pypdf/_writer.py                  | 15 ++++-----------
 pypdf/generic/_data_structures.py |  4 +++-
 2 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/pypdf/_writer.py b/pypdf/_writer.py
index 8f365cf60..10cc9342a 100644
--- a/pypdf/_writer.py
+++ b/pypdf/_writer.py
@@ -2218,18 +2218,12 @@ def clean(content: ContentStream, images: List[str], forms: List[str]) -> None:
                 if (
                     (
                         operator == b"INLINE IMAGE"
-                        and (
-                            cast(ObjectDeletionFlag, to_delete)
-                            & ObjectDeletionFlag.INLINE_IMAGES
-                        )
+                        and (to_delete & ObjectDeletionFlag.INLINE_IMAGES)
                     )
                     or (operator in jump_operators)
                     or (
                         operator == b"Do"
-                        and (
-                            cast(ObjectDeletionFlag, to_delete)
-                            & ObjectDeletionFlag.XOBJECT_IMAGES
-                        )
+                        and (to_delete & ObjectDeletionFlag.XOBJECT_IMAGES)
                         and (operands[0] in images)
                     )
                 ):
@@ -2256,8 +2250,7 @@ def clean_forms(
                 try:
                     content: Any = None
                     if (
-                        to_delete
-                        & ObjectDeletionFlag.XOBJECT_IMAGES
+                        to_delete & ObjectDeletionFlag.XOBJECT_IMAGES
                         and o["/Subtype"] == "/Image"
                     ):
                         content = NullObject()  # to delete the image keeping the entry
@@ -2314,7 +2307,7 @@ def remove_images(
         Remove images from this output.
 
         Args:
-            to_delete : The type of images to be deleted 
+            to_delete : The type of images to be deleted
                 (default = all images types)
             ignore_byte_string_object: deprecated
         """
diff --git a/pypdf/generic/_data_structures.py b/pypdf/generic/_data_structures.py
index ff1dfb676..f886314d8 100644
--- a/pypdf/generic/_data_structures.py
+++ b/pypdf/generic/_data_structures.py
@@ -293,7 +293,9 @@ def _clone(
                             except Exception:
                                 cur_obj = None
                         for s, c in objs:
-                            c._clone(s, pdf_dest, force_duplicate, ignore_fields, visited)
+                            c._clone(
+                                s, pdf_dest, force_duplicate, ignore_fields, visited
+                            )
 
         for k, v in src.items():
             if k not in ignore_fields:

From 224e0da90ea1f8e37248fbc96cc9a080573cd5f4 Mon Sep 17 00:00:00 2001
From: Martin Thoma <info@martin-thoma.de>
Date: Sun, 29 Oct 2023 05:31:08 +0100
Subject: [PATCH 2/2] Add comment

---
 pypdf/generic/_data_structures.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pypdf/generic/_data_structures.py b/pypdf/generic/_data_structures.py
index f886314d8..4ee13a13b 100644
--- a/pypdf/generic/_data_structures.py
+++ b/pypdf/generic/_data_structures.py
@@ -188,7 +188,7 @@ def clone(
         except Exception:
             pass
 
-        visited: Set[Tuple[int, int]] = set()
+        visited: Set[Tuple[int, int]] = set()  # (idnum, generation)
         d__ = cast(
             "DictionaryObject",
             self._reference_clone(self.__class__(), pdf_dest, force_duplicate),
@@ -205,7 +205,7 @@ def _clone(
         pdf_dest: PdfWriterProtocol,
         force_duplicate: bool,
         ignore_fields: Optional[Sequence[Union[str, int]]],
-        visited: Set[Tuple[int, int]],
+        visited: Set[Tuple[int, int]],  # (idnum, generation)
     ) -> None:
         """
         Update the object from src.