* include/bits/locale_facets.h: (struct __pad): Comment on
implementation.
(__verify_grouping): Same.
(__add_grouping): Same.
* include/bits/locale_facets.tcc (__verify_grouping): Move
comments to declaration.
(__add_grouping): Same.
* include/bits/locale_facets.tcc:
(__write<_CharT, _OutIter>): New function.
(__write<_CharT>): New function specialization.
(num_put::_M_insert): Remove explicit loop over iterator. Use
__write.
(num_put::_M_widen_float): Remove __basefield.
(num_put::_M_widen_int): Move __basefield to within grouping block.
* include/bits/streambuf_iterator.h: Include <streambuf>.
(ostreambuf_iterator::_M_put): Add.