From mboxrd@z Thu Jan  1 00:00:00 1970
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From: hiro <23hiro@gmail.com>
Date: Wed,  9 May 2018 13:42:15 +0200
Message-ID: <CAFSF3XMfkKEFuSkZ7h9oZqbM=cBsqURSpB8VZJrWbc=hwS_pGA@mail.gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] how to undo in Rio shell window and Acme editor?
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in sam you can type u in the command window for undo.