Improve context propagation docstring #794

Job	Run time
build-lint-test (3.9, ubuntu-latest)	5m 27s
build-lint-test (3.9, macos-arm)	6m 31s
build-lint-test (3.12, macos-intel)	7m 6s
build-lint-test (3.9, windows-latest)	6m 5s
build-lint-test (3.9, macos-intel)	8m 0s
build-lint-test (3.12, windows-latest)	6m 12s
build-lint-test (3.12, macos-arm)	5m 34s
build-lint-test (3.12, ubuntu-latest)	5m 31s
	50m 26s

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