Tweak summoning-related messages again.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5676 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 9, 2008
ATIPL5YS7PRHIEEBBLNOJMAZWTQLPBWGWOQZO5SHPZB475GEZK7AC
Change contents