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regular expression

From: Burkhard Schultheis
Subject: regular expression
Date: Mon, 25 Jan 2010 12:00:16 +0100
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.5) Gecko/20091204 Thunderbird/3.0
I want to search for the following string: A hyphen not surrounded by spaces. Therefore I tried the following pattern: 
[^ ]-[^ ].
But this pattern finds a hyphen preceded by a letter and followed by a newline character, too. 

How to exclude the newline character? I tried
[^ ]-[^ \n]
but that does not work. Why? And how to search for this?

Thank you in advance!

Regards
Burkhard
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