Move self import to doctests #1257

Job	Run time
mypy	27s
sdist	3m 19s
ruff	7s
parse_sdl (windows-latest, 3.2.16)	45s
parse_sdl (macos-latest, 3.2.16)	23s
test-docs	4m 5s
build (ubuntu-latest, 3.10, x64)	6m 13s
tox (ubuntu-latest)	3m 30s
build (windows-latest, 3.10, x64)	2m 39s
build (ubuntu-latest, pypy-3.10, x64)	4m 26s
build (windows-latest, 3.10, x86)	2m 50s
linux-wheels (aarch64, cp310-manylinux*)	4m 12s
build (windows-latest, pypy-3.10, x64)	3m 26s
build (windows-latest, pypy-3.10, x86)	3m 28s
linux-wheels (aarch64, pp310-manylinux*)	3m 24s
pyodide	5m 3s
build-macos (cp310-*_universal2)	2m 6s
linux-wheels (x86_64, pp310-manylinux*)	3m 24s
linux-wheels (x86_64, cp310-manylinux*)	3m 59s
build-macos (pp310-*)	3m 22s
publish	0s
	1h 1m 8s

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