fixing stuff and style of Jacobi3D #82

Job	Run time
ci-amd64 / check-dockerfile-modifications-with-last-commit	6s
ci-amd64 / check-dockerfile-modifications-with-base	4s
ci-amd64 / check-docker-artifact-existence	5s
ci-amd64 / compile-and-test-standard	4m 48s
ci-amd64 / build-image	0s
ci-amd64 / compile-and-test-local-custom-image	0s
ci-amd64 / analyze-coverage-report	0s
ci-amd64 / check-dockerfile-modifications-with-last-commit	6s
ci-amd64 / check-docker-artifact-existence	5s
ci-amd64 / check-dockerfile-modifications-with-base	4s
ci-amd64 / build-image	-385s
ci-amd64 / compile-and-test-standard	4m 58s
ci-amd64 / compile-and-test-local-custom-image	-386s
ci-amd64 / analyze-coverage-report	0s
	-155s

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