[3.12] gh-125832: Clarify comment for inlined comprehensions as per P… (gh-126345)

* [3.12] gh-125832: Clarify comment for inlined comprehensions as per PEP-709 (gh-126322)

* Fix comprehensions comment to inlined by pep 709

* Update spacing

Co-authored-by: RUANG (James Roy) <longjinyii@outlook.com>

* Add reference to PEP 709

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Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
Co-authored-by: RUANG (James Roy) <longjinyii@outlook.com>

* Add space

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Co-authored-by: rimchoi <hyerimc858@gmail.com>
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
Co-authored-by: RUANG (James Roy) <longjinyii@outlook.com>