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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: string-strip
Date: Mon, 19 Jun 2006 19:19:25 -0400
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    > 1. Allow newlines in STR.
    > 2. Treat newlines as white space.

    Shouldn't it really be up to the syntax table?  Or is this supposed to be
    so much in Lisp land that the buffer shouldn't matter?

The syntax table is relevant only for a buffer.
This has nothing to do with any particular buffer.

    > 3. Return nil when resulting string is empty.

That would be a bad idea.