Simplify Add in OppositeCategory

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.33%. Comparing base (8cd8299) to head (d44e0ca). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1672 +/- ## ========================================== - Coverage 81.33% 81.33% -0.01% ========================================== Files 538 538 Lines 67282 67281 -1 ========================================== - Hits 54721 54720 -1 Misses 12561 12561 ``` | [Flag](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | Coverage Δ | | |---|---|---| | [ActionsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `64.09% <ø> (ø)` | | | [AttributeCategoryForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `90.45% <ø> (ø)` | | | [CAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `84.10% <100.00%> (-0.01%)` | :arrow_down: | | [CartesianCategories](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `90.95% <ø> (ø)` | | | [CompilerForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `95.86% <ø> (ø)` | | | [ComplexesAndFilteredObjectsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `73.60% <ø> (ø)` | | | [FreydCategoriesForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `81.56% <ø> (ø)` | | | [GeneralizedMorphismsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `61.81% <ø> (ø)` | | | [GradedModulePresentationsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `44.62% <ø> (ø)` | | | [GroupRepresentationsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `71.92% <ø> (ø)` | | | [HomologicalAlgebraForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `73.21% <ø> (ø)` | | | [InternalExteriorAlgebraForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `93.09% <ø> (ø)` | | | [LinearAlgebraForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `66.54% <ø> (ø)` | | | [ModulePresentationsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `69.88% <ø> (ø)` | | | [ModulesOverLocalRingsForCAP](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `90.70% <ø> (ø)` | | | [MonoidalCategories](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `88.48% <ø> (ø)` | | | [ToricSheaves](https://app.codecov.io/gh/homalg-project/CAP_project/pull/1672/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `21.79% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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