Spelling fixes (mainly from Dylan.) Fixes 1716479, 1715722. Except that

I kept 'heavily armoured' (rather than 'heavily-armoured'.) We might want to be consistent as to whether we have single or double spacing after fullstops, but since both are used rather widely in the code I didn't fix it either way.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1447 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on May 11, 2007
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