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The internal case-changing functions are now used by default on Windows - this circumvents problems (for example with E acute) of the UCRT Windows' runtime.
‘smooth.spline(x,y,*)’ now computes the ‘cv.crit’ statistic correctly, also when ‘is.unsorted(x)’, fixing PR#18294.
‘smooth.spline()’ now stores its logical ‘cv’ argument more safely, fixing a rare bug when printing, and also stores ‘n’.