From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Sat, 15 May 2010 15:16:35 +0200
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From: Rudolf Sykora <rudolf.sykora@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: [9fans] -- in rsc's g script
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Hello,

could anybody tell me what's the meaning of '--' in

grep -n $flags -- $1 *.[Cbchm] /dev/null

?
This I found in Russ Cox's g script.

Thanks
Ruda