A change I would like to highlight is the performance improvement for
large PDF files (#808) 🎉

New Features (ENH):
-  Add papersizes (#800)
-  Allow setting permission flags when encrypting (#803)
-  Allow setting form field flags (#802)

Bug Fixes (BUG):
-  TypeError in xmp._converter_date (#813)
-  Improve spacing for text extraction (#806)
-  Fix PDFDocEncoding Character Set (#809)

Robustness (ROB):
-  Use null ID when encrypted but no ID given (#812)
-  Handle recursion error (#804)

Documentation (DOC):
-  CMaps (#811)
-  The PDF Format + commit prefixes (#810)
-  Add compression example (#792)

Developer Experience (DEV):
-  Add Benchmark for Performance Testing (#781)

Maintenance (MAINT):
-  Validate PDF magic byte in strict mode (#814)
-  Make PdfFileMerger.addBookmark() behave life PdfFileWriters\' (#339)
-  Quadratic runtime while parsing reduced to linear  (#808)

Testing (TST):
-  Newlines in text extraction (#807)

Full Changelog: 1.27.8...1.27.9

Closes py-pdf#161
Closes py-pdf#308

A change I would like to highlight is the performance improvement for
large PDF files (py-pdf#808) 🎉

New Features (ENH):
-  Add papersizes (py-pdf#800)
-  Allow setting permission flags when encrypting (py-pdf#803)
-  Allow setting form field flags (py-pdf#802)

Bug Fixes (BUG):
-  TypeError in xmp._converter_date (py-pdf#813)
-  Improve spacing for text extraction (py-pdf#806)
-  Fix PDFDocEncoding Character Set (py-pdf#809)

Robustness (ROB):
-  Use null ID when encrypted but no ID given (py-pdf#812)
-  Handle recursion error (py-pdf#804)

Documentation (DOC):
-  CMaps (py-pdf#811)
-  The PDF Format + commit prefixes (py-pdf#810)
-  Add compression example (py-pdf#792)

Developer Experience (DEV):
-  Add Benchmark for Performance Testing (py-pdf#781)

Maintenance (MAINT):
-  Validate PDF magic byte in strict mode (py-pdf#814)
-  Make PdfFileMerger.addBookmark() behave life PdfFileWriters\' (py-pdf#339)
-  Quadratic runtime while parsing reduced to linear  (py-pdf#808)

Testing (TST):
-  Newlines in text extraction (py-pdf#807)

Full Changelog: py-pdf/pypdf@1.27.8...1.27.9