[2854085] Qualify multiple matches in a stack with (+extra) instead of (n) in stash search listings. Still somewhat confusing.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10645 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on September 8, 2009
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