properly close OutStream and various fixes #2779

Job	Run time
test_docs	36s
build (ubuntu-latest, 3.9)	2m 55s
build (ubuntu-latest, 3.13)	3m 14s
build (windows-latest, 3.9)	8m 34s
check_release	1m 39s
build (windows-latest, 3.13)	9m 38s
build (macos-latest, 3.9)	3m 9s
link_check	3m 33s
build (macos-latest, 3.13)	5m 48s
build (ubuntu-latest, pypy-3.9)	4m 19s
Make SDist	28s
build (macos-latest, 3.10)	2m 48s
build (ubuntu-latest, 3.11)	2m 59s
build (ubuntu-latest, 3.12)	3m 22s
Test Lint	43s
Test Minimum Versions	2m 12s
Test Prereleases	2m 5s
test_without_debugpy (ubuntu-latest, 3.9)	2m 2s
Install from SDist and Test	1m 55s
coverage	16s
tests_check	2s
	1h 2m 17s

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