Test

Add comment explaining why `typing_extensions.TypedDict` is kept distinct #36707

Job	Run time
stub_uploader tests	4m 23s
Check typeshed structure	11s
mypy: Run test cases	4m 16s
pyright: Run test cases (Darwin, 3.13)	1m 18s
pyright: Run test cases (Linux, 3.12)	1m 11s
pyright: Run test cases (Darwin, 3.14)	1m 1s
pyright: Run test cases (Darwin, 3.12)	1m 26s
mypy: Check stubs (linux, 3.10)	1m 51s
mypy: Check stubs (linux, 3.13)	1m 47s
pyright: Run test cases (Windows, 3.13)	1m 12s
pyright: Run test cases (Darwin, 3.11)	1m 22s
pyright: Run test cases (Linux, 3.14)	1m 24s
mypy: Check stubs (win32, 3.14)	1m 44s
pyright: Run test cases (Linux, 3.11)	1m 20s
mypy: Check stubs (linux, 3.12)	1m 52s
pyright: Run test cases (Linux, 3.13)	1m 32s
pyright: Run test cases (Windows, 3.11)	1m 13s
pyright: Run test cases (Windows, 3.12)	1m 22s
mypy: Check stubs (linux, 3.15)	4m 46s
mypy: Check stubs (win32, 3.10)	1m 55s
pyright: Run test cases (Windows, 3.14)	1m 19s
mypy: Check stubs (win32, 3.15)	4m 43s
mypy: Check stubs (darwin, 3.11)	1m 39s
mypy: Check stubs (win32, 3.11)	1m 42s
mypy: Check stubs (linux, 3.11)	1m 48s
mypy: Check stubs (darwin, 3.10)	1m 39s
mypy: Check stubs (darwin, 3.12)	1m 44s
mypy: Check stubs (darwin, 3.14)	1m 35s
mypy: Check stubs (darwin, 3.13)	1m 51s
mypy: Check stubs (win32, 3.12)	1m 53s
mypy: Check stubs (linux, 3.14)	2m 7s
mypy: Check stubs (win32, 3.13)	1m 46s
mypy: Check stubs (darwin, 3.15)	4m 58s
	1h 5m 50s

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