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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Abbrev should preserve case
Date: Fri, 22 Jun 2007 12:25:08 -0400
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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In-reply-to: <jwvtzt1gmjs.fsf-monnier+emacs@gnu.org> (message from Stefan
	Monnier on Thu, 21 Jun 2007 15:02:34 -0400)
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    Agreed.  But it has since been (ab)used for things like skeletons in
    programming modes where typing "case SPC" would expand to

	 case  in
	   *) ;;
	 esac

    for those kinds of uses, the capitalization footwork of abbrev.el is
    rather harmful.

In practice, how is it harmful?  You would get undesirable results if
you enter `CASE' or `Case', but that problem is easy to avoid: enter
`case' instead.