[Merged by Bors] - feat(CategoryTheory/Triangulated): Functor.mapTriangle commutes with the shift#9073
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[Merged by Bors] - feat(CategoryTheory/Triangulated): Functor.mapTriangle commutes with the shift#9073
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…the shift (#9073) If `F : C ⥤ D` is an additive functor which commutes with a shift by `ℤ`, then `F.mapTriangle : Triangle C ⥤ Triangle D` also commutes with the shift.
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If
F : C ⥤ Dis an additive functor which commutes with a shift byℤ, thenF.mapTriangle : Triangle C ⥤ Triangle Dalso commutes with the shift.