api: allow spacing as grid input #372

Job	Run time
pytest-docker-py310-gcc-omp-adjoint	29m 15s
pytest-docker-py310-gcc-omp-arm64-adjoint	25m 55s
pytest-docker-py310-icx-omp-base	34m 11s
pytest-ubuntu-py310-gcc14-omp-base	46m 15s
pytest-docker-py310-gcc-omp-arm64-base	32m 30s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	43m 22s
pytest-osx-py312-clang-omp-base	35m 28s
pytest-docker-py310-gcc-omp-base	37m 53s
pytest-ubuntu-py311-gcc10-noomp-adjoint	31m 25s
pytest-ubuntu-py312-gcc13-omp-adjoint	37m 26s
pytest-ubuntu-py310-gcc14-omp-adjoint	34m 18s
pytest-docker-py310-icx-omp-adjoint	29m 59s
pytest-ubuntu-py312-gcc13-omp-base	54m 3s
pytest-ubuntu-py311-gcc10-noomp-base	42m 35s
pytest-ubuntu-py313-gcc14-omp-adjoint	28m 42s
pytest-ubuntu-py310-gcc9-omp-base	47m 34s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	42m 26s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	32m 33s
pytest-ubuntu-py312-gcc12-cxxomp-base	55m 18s
pytest-ubuntu-py310-gcc9-omp-adjoint	35m 18s
pytest-ubuntu-py313-gcc14-omp-base	45m 14s
	13h 21m 40s

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