From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f179.google.com ([209.85.219.179]) by ewsd; Fri Jan 11 18:29:31 EST 2019 Received: by mail-yb1-f179.google.com with SMTP id 2so6507646ybw.4 for <9front@9front.org>; Fri, 11 Jan 2019 15:29:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=tDvuDd8wsMaum+maW7k9yPU2MKvB5LcpjN6V9zSxoTY=; b=e85uniJEubd6ObT5Dpe493PYN8FSOvrOXwk0v8LJ8DTV+ACvjHaGS/IhGZUcAsrR2d xrClz7R92uIDauJf3sY/CwLdcl5ZYGYphKIhCfzjhzWs2v0cJKbcvM3IrXBa11tPrPES BmUEKOkDZyqr8blMERYsXirf6tpJFrDfbY/Qw1ctPK9oLI5hgErPFCLkaZL/cp6K1JbI qCj2uMalvoUi6V0+8nrDTQeTpMNGc5HBUScMsaLH5X6a0bmzzBZACzkvuRqLkZS1r3pI Jh31ApzRZRQWkM72huD2AJK9EVwbDNZBUXn+mU7EWSUsvXzzdx2MaG8WNiZ7CAnFEgQ/ KGlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=tDvuDd8wsMaum+maW7k9yPU2MKvB5LcpjN6V9zSxoTY=; b=Bvb+jlKYRS3p3VfWsxgaQ4cNCJp2sYrTey/mVleAURhas1hVVca8fOyIFeKTFgaVPP gCuhYSpyFHbCn9yX2jyVBMefoZcwoCrrP79KcpTn04WDWcBGhdfB9BykDPRuykHvWn58 SD68EzAFOqCPoXiHDVbrXq6HTpGL0PbgcnauAPk8WkQUkl3PExRibjzy2Z9IWIfSnHRT yCbKCYdz8AOedcRsh+8xvoxIokvS1nj+1LjxdmDR4z3X3dDcC8Tl4aaWXwM8NHOGMbIp JuhUdY0SjKuyBSsWARX8FZkUhZjUn29GKwzsHdkU2hwFYmk7abyvcdX1iI616SI5CeXR /03A== X-Gm-Message-State: AJcUukcE2PTG9XZnGFEic9tzCHgYtpIt43DpeDjtBrOH11XKmyHrArCh qWSi2nq6Tpa9BIy+fbi+6FNsKrb1GIixzWR21S3DYg== X-Google-Smtp-Source: ALg8bN5+sZEOKS4trqBzGfgBqrkVh62G8FjNC/NsIX8q5VhXrb0igYdENh7d+oqC0w09kDC6vaieAtkF31JrojqDjRA= X-Received: by 2002:a25:69c6:: with SMTP id e189mr3175952ybc.407.1547249366563; Fri, 11 Jan 2019 15:29:26 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a81:5cc:0:0:0:0:0 with HTTP; Fri, 11 Jan 2019 15:29:25 -0800 (PST) In-Reply-To: References: From: hiro <23hiro@gmail.com> Date: Sat, 12 Jan 2019 00:29:25 +0100 Message-ID: Subject: Re: [9front] bug in sed To: 9front@9front.org Content-Type: text/plain; charset="UTF-8" List-ID: <9front.9front.org> List-Help: X-Glyph: ➈ X-Bullshit: ISO-certified general-purpose proxy i think i know why some think this is obviously wrong: if you do something like s/^x/xx/g it is never done more than once, so why would empty replacement trigger different behavior?