[Python-Dev] Sort out formatting differences in decimal and float

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Sorry for being a curmudgeon, however...

    >>> format(Decimal(1234), '020,g')
    '0,000,000,000,001,234'
    >>> format(Decimal(1234), '0=20,g')
    '0000000000000001,234'

Why in the world would you ever want to insert commas as separators and not
use them consistently?

    >>> format(Decimal('nan'), '020,g')
    '                 NaN'
    >>> format(Decimal('nan'), '0=20,g')
    '00000000000000000NaN'

Why in the world would you ever want to zero pad Nan (or Inf, for that matter)?

    Stefan> The advantage of decimal is that the user has the option to
    Stefan> suppress commas. The behaviour of float is slightly easier to
    Stefan> implement in C.

Why?  If the user asked for them why would you want to suppress (some of)
them?

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