Lab entry diagnostic message was not conditionalised, fixed.

Updated canned lexer.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1964 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on August 4, 2007
H6N5JENCC6GSO75VDOBRZCAE3ORIN3IJUAVZPPYYRVBY2DVGD3ZAC
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