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[bug #20961] hyphen problem: '^[0-9\-_\.]\+$' doesnot work while '^[0-9_

From: Andreas Schwab
Subject: [bug #20961] hyphen problem: '^[0-9\-_\.]\+$' doesnot work while '^[0-9_\.-]\+$' does
Date: Mon, 03 Sep 2007 09:08:21 +0000
User-agent: Mozilla/5.0 (compatible; Konqueror/3.5; Linux; de, en_US) KHTML/3.5.7 (like Gecko) SUSE 
Follow-up Comment #1, bug #20961 (project grep):

[0-9-_.] matches any of the characters '.0123456789]^_', and [0-9_.-] matches
any of '-.0123456789_'.  See the section about the syntax of bracket
expressions in the grep manual.

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  <http://savannah.gnu.org/bugs/?20961>

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