Mark Dickinson email@example.com added the comment:
Yep, there's an oddity here that's directly inherited from C's sprintf family of functions, namely that in %e-style formatting you give the number of digits after the point (= one less than the total number of significant digits), and in %g-style formatting you give the total number of significant digits instead.
Can you give a pointer, or link, to the documentation section you were looking at?
The description at:
looks fine to me. Note 3, which relates to the '%e' and '%f'-style formatting, talks about number of places after the point. Note 4, which relates to '%g' formatting, talks about the total number of significant digits.
---------- nosy: +mark.dickinson