STY: Improve comment in PdfWriter._add_page

Full credit to Lucas

Co-authored-by: "Cimon Lucas (LCM)" <lucas_cimon@connect-tech.sncf>

pypdf/_writer.py

@@ -312,9 +312,9 @@ def _add_page(
  excluded_keys = list(excluded_keys)
  excluded_keys += [PA.PARENT, "/StructParents"]
  # acrobat does not accept to have two indirect ref pointing on the same
- # page; therefore in order to add easily multiple copies of the same "
- # page, we need to create a new dictionary for the page, however the "
- # objects below (including content) is not duplicated
+ # page; therefore in order to add easily multiple copies of the same
+ # page, we need to create a new dictionary for the page, however the
+ # objects below (including content) are not duplicated:
  try: # delete an already existing page
  del self._id_translated[id(page_org.indirect_reference.pdf)][ # type: ignore
  page_org.indirect_reference.idnum # type: ignore