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From: Stefan Monnier <monnier@iro.umontreal.ca>
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Subject: Re: Putting == before and after selected text
Date: Sun, 25 Apr 2010 11:48:36 -0400
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> I would like some key to a command. This is not difficult, but this
> command should, once it is executed on some text, put `==' before the
> text (on the line before) and `==' after the text (on the line after).

> How could I do this?

(define-skeleton my-==-command "Insert == before and after the region"
  nil
  "--" _ "--")

Then you can call that command with M-x my-==-command RET
You'll probably want to bind it via define-key in some mode.


        Stefan