error upon defining the functor Polynomial example from Julia docs

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I tried to define a functor following the julia docs here: https://docs.julialang.org/en/v1/manual/methods/#Function-like-objects-1 Here is the full text of the example I tried to recreate:

julia> struct Polynomial{R}
           coeffs::Vector{R}
       end

julia> function (p::Polynomial)(x)
           v = p.coeffs[end]
           for i = (length(p.coeffs)-1):-1:1
               v = v*x + p.coeffs[i]
           end
           return v
       end

julia> (p::Polynomial)() = p(5)

I expected it to work, so I could for example call p(3), instead I get an error "Multiple definitions for Polynomial".

fonsp / Pluto.jl

error upon defining the functor Polynomial example from Julia docs #2735