sub-subtypes (such as the rod of destruction [ice]) can be looked up via "destruction [ice]", the same way books that have sub-subtypes (such as the book of Conjurations [ice]) can.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8957 c06c8d41-db1a-0410-9941-cceddc491573
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if (item_is_rod(*this) && know_pluses
&& !basename && !qualname && !dbname)
{
buff << " (" << (this->plus / ROD_CHARGE_MULT)
<< "/" << (this->plus2 / ROD_CHARGE_MULT)
<< ")";
}