[issue532631] Confusions in formatfloat

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

I've replaced the fabs(x) / 1e25 >= 1e25 test with fabs(x) >= 1e50 in 
r70678.  On IEEE 754 systems, assuming round-to-nearest, these two tests 
have identical meaning.

I've also fixed the docs, replacing 1e25 by 1e50.

Is there a good reason for

'%.100f'% 1e49

to raise OverflowError (rather than providing the requested 100 places 
after the decimal point), other than implementation convenience?

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