Fix for issue #150.

[Saldivarcher]

This fix adds argument pack to <template-args>, which I seen cxxfilt use:

case 'I':
case 'J':
    /* An argument pack. */
    return d_template_args(di);

And after my fix

_ZN5boost9unordered18unordered_multimapItN3xxx6xxxxxx6xxxxxx14xxxxxxxxxxxxxxENS_4hashItEESt8equal_toItESaISt4pairIKtS5_EEE7emplaceIISC_EEENS0_15iterator_detail8iteratorINS0_6detail16grouped_ptr_nodeISC_EEEEDpOT_ becomes

boost::unordered::iterator_detail::iterator<boost::unordered::detail::grouped_ptr_node<std::pair<unsigned short const, xxx::xxxxxx::xxxxxx::xxxxxxxxxxxxxx> > > boost::unordered::unordered_multimap<unsigned short, xxx::xxxxxx::xxxxxx::xxxxxxxxxxxxxx, boost::hash<unsigned short>, std::equal_to<unsigned short>, std::allocator<std::pair<unsigned short const, xxx::xxxxxx::xxxxxx::xxxxxxxxxxxxxx> > >::emplace<std::pair<unsigned short const, xxx::xxxxxx::xxxxxx::xxxxxxxxxxxxxx> >(std::pair<unsigned short const, xxx::xxxxxx::xxxxxx::xxxxxxxxxxxxxx>&&...)

and

_ZNSt6vectorIN3xxx6xxxxxx15xxxxxxxxxxxxxxxESaIS2_EE12emplace_backIIS2_EEEvDpOT_

becomes

void std::vector<xxx::xxxxxx::xxxxxxxxxxxxxxx, std::allocator<xxx::xxxxxx::xxxxxxxxxxxxxxx> >::emplace_back<xxx::xxxxxx::xxxxxxxxxxxxxxx>(xxx::xxxxxx::xxxxxxxxxxxxxxx&&...)

[fitzgen]

Thanks for the fix @miguelsaldivar! :)

Before merging, we need to add some regression tests. In tests/tests.rs, add demangles!(..) tests for the symbols reported in #150 -- if you look at the other tests, it should be straightforward to see how they are written. If you have questions, don't hesitate to ask!

Thanks again!

[Saldivarcher]

You're welcome 😄! But alright tests are there, let me know if you need anything else! Thanks for the quick response as well 👍

[fitzgen]

Thanks @miguelsaldivar :)