Dualization.jl
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Review sign of dual constraints
currently we might be changing both side of the dual linear equality constraints. It is equivalent for most implementations, but it might be a bad way to go considering: https://www.gams.com/latest/docs/S_PATH.html
See also https://github.com/JuliaOpt/Dualization.jl/pull/67#discussion_r361769821
Also: https://github.com/jump-dev/Dualization.jl/pull/129#issuecomment-1101839465