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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.help
Subject: Re: string-match bug?
Date: Wed, 09 Dec 2009 11:16:07 -0500
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> Perhaps you mean:

>   (imply (and  (string-match  regex1 str1) (string-match  regex2 str2))
>          (string-match (concat regex1 regex2) (concat str1 str2)))

Of course, even that one isn't 100% true, if you consider the case where
regex1 ends with $, for example.


        Stefn