changed pivot selection to one modelled on Go's sort package (Tukey's Ninther,'' median of three medians of three;  This was done to enforce determinism
changed pivot selection to one modelled on Go's sort package (Tukey's Ninther,'' median of three medians of three;  This was done to enforce determinism

verdverm/pypge,verdverm/pypge,verdverm/pypge,verdverm/pypge,verdverm/pypge,verdverm/pypge