Merge pull request #2115 from desihub/zero_div_fix #4405

Job	Run time
Doc test (ubuntu-latest, 3.9)	55s
Unit tests (ubuntu-latest, 3.9, ==5.0, ==1.1.6, <1.23)	6m 6s
Unit tests (ubuntu-latest, 3.9, ==5.0, <2, <1.23)	5m 25s
Unit tests (ubuntu-latest, 3.9, <5.1, ==1.1.6, <1.23)	7m 18s
Unit tests (ubuntu-latest, 3.9, <5.1, <2, <1.23)	7m 34s
Unit tests (ubuntu-latest, 3.10, ==5.0, ==1.1.6, <1.23)	6m 21s
Unit tests (ubuntu-latest, 3.10, ==5.0, <2, <1.23)	7m 34s
Unit tests (ubuntu-latest, 3.10, <5.1, ==1.1.6, <1.23)	7m 13s
Unit tests (ubuntu-latest, 3.10, <5.1, <2, <1.23)	5m 31s
API doc completeness test (ubuntu-latest, 3.9)	35s
Test coverage (ubuntu-latest, 3.9, ==5.0, ==1.1.6, <1.23)	7m 35s
Style check (ubuntu-latest, 3.9)	26s
	1h 2m 33s

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