update docstrings for consistency #4141

Job	Run time
checks / check-style	1m 40s
checks / other-checks	38s
devcontainer / build (amd64, 12.0, conda)	4m 20s
devcontainer / build (amd64, 12.0, pip)	5m 32s
conda-cpp-build	0s
wheel-build-pylibcugraph	0s
conda-python-build	0s
conda-cpp-tests	0s
wheel-tests-pylibcugraph	0s
conda-python-tests	0s
conda-notebook-tests	0s
docs-build	0s
wheel-build-cugraph	0s
wheel-build-nx-cugraph	0s
wheel-tests-cugraph	0s
wheel-tests-nx-cugraph	0s
wheel-build-cugraph-pyg	0s
wheel-build-cugraph-dgl	0s
wheel-tests-cugraph-pyg	0s
wheel-tests-cugraph-dgl	0s
pr-builder	0s
	12m 10s

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