From: Brian Candler <b.candler@...>
Date: 2011-02-12T19:40:43+09:00
Subject: Re: RCR feedback: Numeric#grouped

How about supporting extended sprintf syntax? From the manpage:

       The five flag characters above are defined  in  the  C  standard. 
The
       SUSv2 specifies one further flag character.

       '      For decimal conversion (i, d, u, f, F, g, G) the output is 
to be
              grouped with thousands' grouping characters if the locale 
infor‐
              mation  indicates any.  Note that many versions of gcc(1) 
cannot
              parse this option and will issue  a  warning.   SUSv2 
does  not
              include %'F.

i.e. "%'d" % 12345678

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