fix typos

Author: oxinabox

src/stage1/forward.jl

@@ -38,7 +38,7 @@ struct TaylorRequired
     z₁
     z₂
 end
-function Base.showerror(io::IO, err)
+function Base.showerror(io::IO, err::TaylorRequired)
     order_str1 = order_str(err.order)
     print(io, "In Eras mode all higher order derivatives must be taylor, but encountered one where the taylor requirement z₁ == z₂ was not met.")
     println(is, "derivative on $order_str1 path: z₁ = ", err.z₁)

src/stage1/mixed.jl

@@ -43,7 +43,7 @@ function shuffle_down_frule(∂☆p, my_frule, args...)
     ∂☆p(my_frule, map(shuffle_down, args)...)
 end
 
-function (this::∂⃖{N})(::∂☆internal{M}, args::AbstractTangentBundle{1}...) where {N, M, E}
+function (this::∂⃖{N})(::∂☆internal{M}, args::AbstractTangentBundle{1}...) where {N, M}
     r = this(∂☆shuffle{N}(), args...)
     if primal(r) === nothing
         return this(∂☆recurse{N}(), args...)