PEP 757: mark as Final

[skirpichev]

• Final implementation has been merged (including tests and docs)
• PEP matches the final implementation
• Any substantial changes since the accepted version approved by the SC/PEP delegate
• Pull request title in appropriate format (PEP 123: Mark Final)
• Status changed to Final (and Python-Version is correct)
• Canonical docs/spec linked with a canonical-doc directive
  (or canonical-pypa-spec for packaging PEPs,
  or canonical-typing-spec for typing PEPs)

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📚 Documentation preview 📚: https://pep-previews--4167.org.readthedocs.build/

[hugovk]

• Canonical docs/spec linked with a canonical-doc directive
  (or canonical-pypa-spec for packaging PEPs,
  or canonical-typing-spec for typing PEPs)

Has this PEP been documented at https://docs.python.org/dev/?

If so, please can you link to its documentation using one canonical-doc?

[hugovk]

Thank you!

[hugovk]

By the way, make spellcheck finds these typos, let's fix them at the same time:

peps/pep-0757.rst:485: bufferes ==> buffers, buffered
peps/pep-0757.rst:556: accross ==> across

[vstinner]

Merged, thank you.