properly close OutStream and various fixes #2778

Job	Run time
build (ubuntu-latest, 3.9)	2m 49s
check_release	1m 47s
build (ubuntu-latest, 3.13)	3m 2s
link_check	1m 51s
build (windows-latest, 3.9)	8m 59s
Make SDist	26s
build (windows-latest, 3.13)	8m 12s
build (macos-latest, 3.9)	2m 51s
test_docs	45s
Test Lint	45s
build (macos-latest, 3.13)	3m 25s
build (ubuntu-latest, pypy-3.9)	4m 33s
Test Minimum Versions	2m 25s
Test Prereleases	2m 5s
build (macos-latest, 3.10)	2m 50s
build (ubuntu-latest, 3.11)	2m 41s
test_without_debugpy (ubuntu-latest, 3.9)	2m 5s
build (ubuntu-latest, 3.12)	3m 19s
Install from SDist and Test	2m 1s
coverage	0s
tests_check	2s
	56m 53s

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