issetequal docstring says that
issetequal(a, b) is equivalent to
a ⊆ b && b ⊆ a, but I found this isn’t the case when there are duplicate elements. In v1.0.0:
julia> a = [1,2,3]; julia> b = [1,1,2,3]; julia> a ⊆ b && b ⊆ a true julia> issetequal(a, b) false
Is this the intended behavior?