format_float_OSprintf_g(val, precision)
printf("%.*g", precision, val);
for half/float/double, or replacing 'g' by 'Lg' for longdouble. This method is designed to help cross-validate the format_float_* methods.
Value to format.
Precision given to printf.
The string representation of the floating point value
Print a floating point scalar using the system's printf function, equivalent to:
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