Theorem: LeanColls.Seq.size_update (LeanColls/Classes/Seq.lean)

State before:
C : Type u_1
τ : Type u_2
inst✝¹ : Seq C τ
inst✝ : LawfulSeq C τ
cont : C
i : Fin (size cont)
f : τ → τ
⊢ size (update cont i f) = size cont
Tactic:
simp [size_def, List.instSeqList]
State after:
no goals