hashtable cleanup + new testsuite files

[Paolo Carlini]

On 11/28/2011 09:29 PM, François Dumont wrote:
> 2011-11-28  François Dumont <fdumont@gcc.gnu.org>
>
>         * include/bits/hashtable.h (_Hashtable<>::_M_rehash): Remove code
>         useless now that the hashtable implementation put the hash 
> code in
>         cache if the hash functor throws.
>         * testsuite/23_containers/unordered_set/erase/1.cc: Enhance 
> test by
>         checking also distance between begin and end iterators to 
> validate
>         underlying data model.
>         * testsuite/23_containers/unordered_multiset/erase/1.cc: 
> Likewise.
>         * testsuire/23_containers/unordered_map/erase/1.cc: Likewise.
>         * testsuite/23_containers/unordered_multimap/erase/1.cc: 
> Likewise.
>         * testsuite/23_containers/unordered_multiset/erase/2.cc: New.
>         * testsuite/23_containers/unordered_multimap/erase/2.cc: New.
>
> Tested under linux x86_64.
>
> Ok to commit in trunk ?
Ok, thanks.

Paolo.