fact: Definition idto2mor_comp {x y : C} {f g h : x --> y} (p : f = g) (q : g = h) : idto2mor p • idto2mor q = idto2mor (p @ q).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Univalence