Commit 2020-05-15 07:57 b44fa3ca

chore(data/int/basic): mark cast_sub with simp attribute (#2687) I think the reason this didn't have the simp attribute already was from the time when sub_eq_add_neg was a simp lemma, so it wasn't necessary. I'm adding the simp attribute back now that sub_eq_add_neg is not a simp lemma.