new woes with istream

[Benjamin Kosnik]

>   std::cout << 5.0 << std::endl;

Hmm. This is not a regression, and has not worked even in 2.90.6.1. This 
is the bit not implemented:

(bits/locale_facets.tcc: 1024)

  template <typename _CharT, typename _OutIter>
    _OutIter 
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& /*__io*/, char_type /*__fill*/,
           double /*__v*/) const
    {
      return __s;  // XXX not done
    }

(I thought there was somebody working on this particular bit, but perhaps 
I'm wrong?)

-benjamin