Distributions: minor simplification to Cauchy for performance
Distributions: minor simplification to Cauchy for performance

shaia/mathnet-numerics,shaia/mathnet-numerics,shaia/mathnet-numerics,mathnet/mathnet-numerics,shaia/mathnet-numerics,mathnet/mathnet-numerics,mathnet/mathnet-numerics,mathnet/mathnet-numerics,shaia/mathnet-numerics,mathnet/mathnet-numerics