Improve context propagation docstring (#209) #795

Job	Run time
build-lint-test (3.9, windows-latest)	6m 1s
build-lint-test (3.12, ubuntu-latest)	5m 36s
build-lint-test (3.9, macos-arm)	6m 55s
build-lint-test (3.12, macos-arm)	5m 18s
build-lint-test (3.12, windows-latest)	6m 7s
build-lint-test (3.9, macos-intel)	8m 22s
build-lint-test (3.9, ubuntu-latest)	5m 25s
build-lint-test (3.12, macos-intel)	7m 7s
	50m 51s

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