rfl
V : Type u
E : Type v
inst✝¹ : DecidableEq V
inst✝ : DecidableEq E
G✝ : Graph V E
u✝ v✝ w✝ : V
e : EdgeBetween G✝ v✝ w✝
G : Graph V E
v w u : V
a : EdgeBetween G v w
b₁ b₂ : EdgePath G w u
r : [[b₁]] = [[b₂]]
⊢ cons a b₂ = cons a (nil w) ++ b₂
no goals