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is this a grep bug?

From: junior
Subject: is this a grep bug?
Date: Tue, 25 Jun 2002 22:39:38 +0900
User-agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.1a) Gecko/20020611 
is this a bug?  If not, how can I do it with grep/egrep/fgrep?

thanks.
junior

$ grep "--- ------" datafile
grep: unrecognized option `--- ------'
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.

$ egrep "--- ------" datafile
egrep: unrecognized option `--- ------'
Usage: egrep [OPTION]... PATTERN [FILE]...
Try `egrep --help' for more information.

$ fgrep "--- ------" datafile
fgrep: unrecognized option `--- ------'
Usage: fgrep [OPTION]... PATTERN [FILE]...
Try `fgrep --help' for more information.


$ grep '--- ------' datafile
grep: unrecognized option `--- ------'
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.

$ egrep '--- ------' datafile
egrep: unrecognized option `--- ------'
Usage: egrep [OPTION]... PATTERN [FILE]...
Try `egrep --help' for more information.

$ fgrep '--- ------' datafile
fgrep: unrecognized option `--- ------'
Usage: fgrep [OPTION]... PATTERN [FILE]...
Try `fgrep --help' for more information.
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