(There's probably some source of poison or other where I forgot to add the mons_class_is_confuseable check. Feel free to add as needed.)
Fix 1897271: potions of poison being treatened like poisoned ammo (There's actually a much bigger issue: now that randart names are configurable players could name half of their randarts "poisoned" and make them be poisoned. In short, the beam string comparison find("poison") needs to be replaced with something more sensible.)
Also some more comment clean-up.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3461 c06c8d41-db1a-0410-9941-cceddc491573
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