|%g a floating-point number, in %e or %f notation
The full piece of documentation is:
%e a floating-point number, in scientific notation
%f a floating-point number, in fixed decimal notation
%g a floating-point number, in %e or %f notation
I think the last of those 3 is just shorthand for:
%g a floating-point number, in scientific notation or fixed decima
Note that "%.*g" will give you scientific notation and "%*g" will give you fixed decimal notation (ie fixed to 6 digits of precision).
I think it's just meant to provide a quick indication of what "%g" formatting does, for anyone who is unfamiliar with it.
Those are the only excuses I can come up with ;-)
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