tests

Return real boolean from copy_file #1205

Job	Run time
test_cygwin (39, windows-latest)	4m 11s
collateral (diffcov)	1m 12s
ci_setuptools (3.10, ubuntu-latest)	4m 21s
collateral (docs)	27s
test (3.9, ubuntu-latest)	49s
test_msvc_python_mingw	2m 56s
test (3.9, macos-latest)	1m 10s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	2m 7s
test (3.9, windows-latest)	48s
test_msys2_mingw (mingw32, i686, gcc, g++)	3m 5s
test (3.13, ubuntu-latest)	1m 1s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	1m 58s
test (3.13, macos-latest)	1m 3s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	2m 6s
test (3.13, windows-latest)	48s
test (3.10, ubuntu-latest)	1m 3s
test (3.11, ubuntu-latest)	46s
test (3.12, ubuntu-latest)	50s
test (3.14, ubuntu-latest)	1m 1s
test (pypy3.10, ubuntu-latest)	1m 1s
check	3s
release	0s
	32m 46s

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